# Homework Help: Help Needed

1. Dec 6, 2007

### ryansmith885

Hello I am having trouble with a physics question.
Could some one please lend me a hand or some tips on how to work this out:

http://img225.imageshack.us/img225/1665/graphht1.jpg [Broken]

the question is : Write down the mathematical relationship indicated by this graph.
Any help would be great
Thanks

Last edited by a moderator: May 3, 2017
2. Dec 6, 2007

### Kurdt

Staff Emeritus
This sounds like a homework question. Are you familiar with the general form of the equation of a straight line?

3. Dec 6, 2007

### stewartcs

Hint: Point-Slope Equation.

4. Dec 6, 2007

### silver-rose

Well first of all, from the straight line NOT going through the origin, you can deduce that the function is LINEAR, but not DIRECTLY PROPORTIONAL.

To figure out a quantitative relationship (ie a function), we see that two sets of coordinates are needed so as to deduce the "m"(slope) and the "c" in the general linear function

$$y=mx+c$$