Answer:

See Attachment for Graph
Step-by-step explanation:
Given


Required
Determine the point of intersection
To do this, we simply equate both expressions of y
i.e.

Solve for x


Divide through by -5



<em>Hence, the point of intersection is 1.2</em>
Answer is 16
8 (6 1/4 x 3.2 - 18)
8 ( 6x4+1) = 25/4
8 (25/4 x 3.2 - 18)
8 (25/4 x 3.2) = 80/4 = 20
8 (20 - 18) = 2
8 x 2 = 16