Answer:
7
Step-by-step explanation:
So, substitute in your 4 for r, 2(3) + 1. Multiply 2 and 3 to get 6 and then add a to get 7. I hope this helps :)
D(4) = 6
Using the blue graph, find the y value when x =4
the y value is 6 when x=4
A
