# math

Raj is deciding between two cell phone plans, A and B, which are both linear functions. The monthly charge for plan A according to the number of minutes used is shown in the table.

Monthly Charge for Plan A

Minutes used, x

Monthly charge (\$), y

0

14.45

3

14.84

6

15.23

9

15.62

12

16.01

Plan B has the same monthly base charge as plan A, but it charges a different amount per minute used. If the total monthly charge for plan B is \$22.10 when 45 minutes are used, what is the slope of the linear function that represents the cost of plan B?

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1. the monthly charge for A is clearly 14.45 (0 minutes)

So, for B, \$(22.10-14.45)/45min = \$0.17/min

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2. 👎
2. So B s correct answer?

1. 👍
2. 👎
3. Raj is deciding between two cell phone plans, A and B, which are both linear functions. The monthly charge for plan A according to the number of minutes used is shown in the table.

Monthly Charge for Plan A
Minutes used, x
Monthly charge (\$), y
0
14.45
3
14.84
6
15.23
9
15.62
12
16.01

Plan B has the same monthly base charge as plan A, but it charges a different amount per minute used. If the total monthly charge for plan B is \$22.10 when 45 minutes are used, what is the slope of the linear function that represents the cost of plan B?
0.13
0.17
0.39
0.45

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2. 👎

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