Question

A cell phone plan has a monthly cost that is shown in the table below. What is the correct statement regarding the average rate of change during the 40-minute time of talk?
A The average rate of change is $0.50, meaning that for each minute of talk time, the monthly bill increases by $0.50.
B The average rate of change is $0.50, meaning that for every ten minutes of talk time, the bill increases by $0.50.
C The average rate of change is $0.05, meaning that for each minute of talk time, the monthly bill increases by $0.05.
D The average rate of change is $0.05, meaning that for every ten

Answer 1

C

Answer 2

@JJ_Diamond I didn't even attach the graph yet how could you possibly know that

Answer 3

it will be the slope of a line connecting those two points on the graph, start and end of the 40 min talk

Answer 4

unless it is a line, then the slope is there already

Answer 5

I've taken this test before but you can attach the graph so I can double check

Answer 6

oh ok

Answer 7

it is a line, notice the rate of change is always the same, 50 cents for every 10 min

Answer 8

Alright so answer isn't c my bad it's B

Answer 9

the rate of change is the slope

Answer 10

thank you @DanJS and @JJ_Diamond

Answer 11

although, you dont need to know what the graph looks like or anything, they said 'average' rate