Answer:
a. The cost of 10 tickets
Step-by-step explanation:
We don't know what the expression is supposed represent, but the answer choices suggest that ...
c = 5t +3
represents the cost of t tickets. Then, when t=10, c = 53 will represent the cost of 10 tickets.
1. a
2. b
3. c
4. d
The rate of change is -2
f(b)-f(a) 12-2 10
---------- = ------------ = -------- = -2
b-a 1-6 -5