Answer:
y = 4x + 5
Explanation:
Well starting off, the slope intercept form is y=mx+b, where m is the slope and b is the y-intercept.
It gives you the slope and an x and y value, since in (-1,1), the x is -1 and the y is 1.
Plug in those values to solve for b.
1 = 4(-1) + b
1 = -4 + b
Add 4 to both sides...
5=b