Find an equation of the line having slope and containing the given point.

Question

M=4/5, (3, -7)
The equation of the line is Y=

I have tried to work this problem and could not get the answer. Please help me.

Answer 1

y = (4/5) x + b
-7 = (4/5)(3) + b
b = -7 -(12/5)
b = -35/5 - 12/5
b = - 47/5
so
y = (4/5) x - 47/5
or
5 y = 4 x - 47

Answer 2

m=-4/5, T(1/3)=7/4