Step-by-step explanation
Linear is a straight line. You might have heard of Linear Function.

The equation above is slope-intercept form.
Exponential is both increasing graph and decreasing graph depending on the coefficient.
Exponential Equation

Exponential Graph increases when a-term is greater or equal to 1.
Exponential Graph decreases when a-term is greater than 0 but less than 1.
From the equation, it is exponential of x-term as an exponent. The equation matches with exponential form.
Answer