Answer:
a) Linear equation
Explanation:
Definition of acceleration
[tex]a=\frac{dv}{dt}\\[/tex]
if a=constant and we integrate the last equation
[tex]v(t)=v_{o}+a*t[/tex]
So the relation between the time and the velocity is linear. If we plot the velocity in function of time, the plot is a line, and the acceleration is the slope of this line.