Answer:
-1
Step-by-step explanation:
f(4) = 2.5(4) -11
f(4) = 10 -11
f(4) = -1
J
The slope is negative. The relationship is proportional
Its plus 5
8+5= 13
13+5= 18
18+5= 23
23+5= 28
Hope this helps ;)