Monday, May 17th, 2010
43

Graphed At Last: f(x) = ½x + 7

f(x) = ½x + 7
World's most useful applied mathematics explained in full.

43 Comments / Post A Comment

deepomega (#1,720)

I got a tattoo of that equation on the back of my hand. There are Facts you just should never be in danger of forgetting.

Tuna Surprise (#573)

I have a tattoo of the more useful matrix: How Ugly vs. How Rich. Let's see here…fat, bald, short, liverspots puts him at a "1" on the (y) axis and $10 million in liquid assets put him at a "9" on the (x) axis. Good news! Looks like he is datable!

saythatscool (#101)

Ummm, how old is mathnet? And what did you fuckerz do to her anyway?

We were supposed to go out for dippin dots and limeade this weekend.

riggssm (#760)

Oh wow. My practice has been only 5 years either way. I've been limiting myself!

KarenUhOh (#19)

Well, this explains the disapproving looks I get when I'm out with Rin Tin Tin.

HiredGoons (#603)

I was never very good at math, I'm more of a visual learner.

nicole (#2,443)

yeah i kind of wonder if part of the slant is related to the fact that if you don't look older, people assume you are not?

the Loud Coast (#1,362)

Now I know how old I need to be before it's acceptable to date a 120 year old.

Annie K. (#3,563)

I'm effectively innumerate, but I don't see why the slope of that red line is so much steeper than the slope of the blue line. I'll probably end up saying, as usual, "oh, sure, I see, I should have thought of that, sorry."

deepomega (#1,720)

It is way more acceptable to date an old person than a young person. So there's more room to date above than below.

Limaceous (#2,392)

The blue line is half your age plus 7. So if you were, say, 40, the blue line shows your partner at 27 (half of 40 is 20, plus 7 is 27). The red line is your partner's age when you are half their age plus 7. So if you are 40, your partner is 66 (half of 66 is 33, plus 7 is 40).

kneetoe (#1,881)

@Annie K.: Sorry, I only answer these questions when they are in multiple choice format.

Annie K. (#3,563)

@limaceous: could you take that reasoning the next step and explain why the red line goes up faster than the blue line? I almost understand it, but not with my whole brain, just with a tiny vague part of it that's behind my left ear.

evilfred (#2,351)

@Annie K.: The formula for the blue line is (1/2)x + 7, the formula for the red line is 2(x – 7). Ignore the constants, and we have blue: 0.5x red: 2x. 2 is bigger than 0.5, so the blue line has a bigger "slope", meaning it increases faster. 2x grows faster than 0.5x.

Annie K. (#3,563)

Isn't the red slope steeper than the blue slope, Evilfred? I'm extremely confused now and am going to go buy pancetta to cook with my peas.

evilfred (#2,351)

Gah, sorry, yes i meant that the red has a bigger slope :S

Annie K. (#3,563)

Ok, I'm better now. Thank you. Whew. And pancetta, cut into little pieces, sauteed, and sprinkled over God's fresh peas, makes you believe you can understand any amount of higher math.

atipofthehat (#797)

Unless you're a rock star! Or don't care to be accepted socially.

Bittersweet (#765)

How much do you think it would cost to bribe raynor to rejigger the equation so there's no dating before age 20? I think I'm gonna need all the ammunition I can get when my daughter hits middle school.

Max Kingsbury (#4,973)

Great graph, but the data from dating sites doesn't really agree. It looks more like the upper limit is "my age +3" and the lower limit is "my age *2/3" for men. For women, the upper limit is "my age +6" and the lower limit is my age *7/8".

http://blog.okcupid.com/index.php/2010/02/16/the-case-for-an-older-woman/

TroutSavant (#1,990)

21? Booyah! I knew there was a reason it still felt right!

Of course, I had to figure out how old you are.

TroutSavant (#1,990)

If I hadn't given it away with that "until" I could be 17 and a half. But does this chart even apply to homos?

TroutSavant (#1,990)

By until I meant still. When's that edit feature coming?

melis (#1,854)

No; Nature has taken pity on our natural infertility and as such we are permitted to recruit children to swell our ranks (in both senses of the phrase).

The blue line should flatten-out after it hits 26.

garge (#736)

THANK you; when you have a minute, do you think you can call my mother?

You're banging an old dude?* Sure, I'll call your mother. How old is she and is she attractive?

*call me

delrayser (#319)

"If one is under 14, it is mathematically impossible to date anybody."

As the father of two girls, I look forward to citing this REPEATEDLY.

gumplr (#66)

lol

Between 15 and 17, the acceptable ages should be simply +/- 1. The axes should not include <15.

Maevemealone (#968)

Ugh, maybe I am old because I really don't think I'm interested in guys who are younger than 25. But I'm willing to test that before making it a firm opinion.

Bittersweet (#765)

I'm not sure if I'm more skeeved out thinking about dating a 26-year-old or a 64-year-old.

sox (#652)

Speaking from my own experience, you are only interested in one thing from guys who are younger than 25.

servicy!

cherrispryte (#444)

mmmmm, old dudes.

El Matardillo (#586)

Like all mathematical relations, there are some glaring exceptions:

1) If your partner is old enough to serve as a member of Congress, then he/she is old enough.

2) If you meet them in a casino, then any age over 18 is acceptable.

SeaBassTian (#281)

If your partner is old enough to "serve" a member of Congress, then he/she is old enough. Like "Lucien"!

53! Really!?

No, idiot, your math is off.

phlox (#204)

What this says to me is that it is not cool for me to be banging a 22 year-old.
Not cool.

Cat Stevens may be back, but Harold & Maude are still off the chart.

BasicSand (#2,105)

I hope Choire one day does a graph defining when twink ends and daddy begins.

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