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. So B s correct answer?

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    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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