Write the equation of the line that passes through point (5, 15) with a slope of 4.

Answer 1

y = m x + b
m is given as 4
so
y = 4 x + b
put your point in
15 = 4 * 5 + b
15 = 20 + b
b = -5
so
in the end
y = 4 x - 5