Question

Select all the following functions that are

linear.
Select one or more:
f(x) = 18x^2 + 45x + 45
f(x) = 18 / X + 45
f(x) = 18x
f(x) = 18x + 45
f(x) = 45

Answer 1

f(x) = 18x

f(x) = 18x + 45