Question 254088
Well if x intercept is 4 then the cordinate is (4,0) since y will be zero at the x intercept

if - 2 is the y intercept then the cordinate will be (0, -2)

so now you have two points.  since slope (m) is equal to y2-y1/x2-x1

we can use the cordinates above:

(-2-0)/(0-4) = -2/-4 = 1/2 so now we have the y intercept which is b and the slope which is m

the equation for a line is:  y = mx + b

so:  y = 1/2(x) -2

hope this helps