From the question, we get these informations.
m = 4
(x₁,y₁) = (1,6)
To determine the equation, use this following formula
y - y₁ = m(x - x₁)
Input the numbers
y - y₁ = m(x - x₁)
y - 6 = 4(x - 1)
y - 6 = 4x - 4
y = 4x - 4 + 6
y = 4x + 2
This is the line equation