Question 51247
slope intercept form =   y = mx+b


b is y intercept so we need to find the y value when x is 0. substitute the (-3,0) with (x,y) in the slope intercept form.


y = mx+b
0 = m*-3+b
we know that slope is negative 3.
0 = -3*-3+b
0 = 9+b
b= -9


so substitute m and b values with m and b in the slope intercept form.

y=-3x+(-9)
y=-3x-9