Find th equation of the line that goes through (3,8) and (5,-8)

Question

I got
X = 3
But it doesn't seem right

Answer 1

of course it isn't right
x = 3 would be a vertical line.
A quick sketch will show you that your 2 points do not lie along a vertical line

slope = m = (-8-8)/(5-3) = -16/2 = -8

equation:
y-8 = -8(x-3)

re-arrange to whatever form you learned.

Answer 2

I don't get how to rearrange that