Question

Suppose that the function f(x)=3 x+1.5 represents the cost to rent x movies a
month from redbox. Sara has $15. How much more money will Sara need if she
wants to rent 6 movies?

Answer 1

f(x) = 3x + 5

Place 6 in X

f(6) = 3 * 6  + 5 = 23$

23 - 15 = 8$

Sara need more 8$ to rent a movie in Redbox because de sum of 15$ and 8$ is 23$ (the cost to rent 6 movies).