# graphing: find the y-intercept, need help!

• November 16th 2010, 06:57 PM
jingming90
graphing: find the y-intercept, need help!
So i have two point on my graph

(2,5) and (-3,-3)

the slope is

m=8/5

so y=8/5x + b

i take the first point

so 5= 8/5 (2) + b
5= 16/5 +b

afterwards... im stuck can somebody help me figure out the answers plx(Crying)(Crying)
• November 16th 2010, 07:00 PM
skeeter
Quote:

Originally Posted by jingming90
So i have two point on my graph

(2,5) and (-3,-3)

the slope is

m=8/5

so y=8/5x + b

i take the first point

so 5= 8/5 (2) + b
5= 16/5 +b

$b = 5 - \frac{16}{5}$

common denominator?
• November 16th 2010, 07:16 PM
jingming90
would I still get the same answer if i use (-3,-3)
• November 16th 2010, 07:35 PM
Unknown008
You should be getting the same answer, yes.