Students are selling candy bars to raise money for a class trip. The number of candy bars sold b, and the...

Students are selling candy bars to raise money for a class trip. The number of candy bars sold b, and the amount of money raised c, in dollars, are shown in the table below.
b | c
5 | $6.50
8 | $10.40
Which equation represents the relationship between b and c?
A. c = 0.77b
B. c = 1.3b
C. c = 1.73b
D. c = 3.9b
The points on the graph below represent the costs of cashews in packages of different weights.
Which equation can be used to represent the cost of different-sized packages of cashews?
A. y = x + 15
B. y = 15x
C. y = 8x + 120
D. y = x + 28
3. What is the rate of change between the points (6, 45) and (9, 67.5)?
A. 7.5
B. 8
C. 32
D. 22.5
4. Sharmila recorded the number of pages she read every 5 minutes while reading a novel. Her data is shown in the table below.
Minutes | Pages Read
5 | 33
10 | 38
15 | 43
20 | 48
25 | 53
30 | 58
Which of the following best describes the rate at which Sharmila read the novel?