ANSWER
C = 4.99m + 11
EXPLANATION
Linear functions have the form,
[tex]f(x)=mx+b[/tex]
Where m is the slope - or growth rate, and b is the y-intercept - or initial value.
For this problem, the cost of the movies is a linear function where the initial value is $11 and the slope is $4.99. Thus, the cost of the ordered movies m is,
[tex]C=4.99m+11[/tex]
