SOLUTION: http://172.85.76.57/Library/00001230_84_622_A1.png can someone help me?

Algebra ->  Systems-of-equations -> SOLUTION: http://172.85.76.57/Library/00001230_84_622_A1.png can someone help me?      Log On


   

Question 999654: http://172.85.76.57/Library/00001230_84_622_A1.png can someone help me?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

you just need the coordinates of two points that lie one line to find the equation of that line
y=mx%2Bb
use y-intercept which is at (0,2); at origin
so, we already know b: b=2
y=mx%2B2
to find a slope, use (0,2) and the point (1,-2) which also lie on a line
m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29=%28-2-2%29%2F%281-0%29=-4%2F1=-4
then, your equation is:
y=+-4x%2B2