Finding y-intersept form two points

[mastershake15]

Homework Statement

suppose you had the points (7,1) and (3,10)

Homework Equations

i know that Y2- Y1/X2 - X1 give you the slope

The Attempt at a Solution

please help this problem is killing my math grade on tests thank you

 

[Dick]

Ok, you have the slope. What is it? The y-intercept form is y=m*x+b where m is the slope. To find b, put one of your points into the equation, say x=7, y=1 and solve for b.

 

[symbolipoint]

This part is wrong. Do you know how to correct this:

2. Homework Equations

i know that Y2- Y1/X2 - X1 give you the slope

Either use a good mathematical typesetting system, such as Tex or TexAide, or write the formula for slope properly using grouping symbols:
(Y2 - Y1)/(X2 - X1)

 

[mastershake15]

oh... thank you i feel silly now and sry bout the incorrectness i have never posted in math/science help forums before