Question

find the equation of the line pasiing throught the given point. Use function notation to write the equation.
(-2,11)and(1,-4)

f(x)

Answer 1

find the slope, you should get 15/-3 or -5

then y = -5x + b
but (1,-4) lies on it
-4 = -5(1) + b
b = 1

f(x) = -5x + 1

A neat trick in this type of question is to sub in the point that was not used in the last part.
It must satisfy the equation and it does.