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Question

The relation between the number of minutes for Talk & Text and the cost of cell phone plan is given in the table. Which of the following gives the equation for the table of data?

A
x = 10y
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B
y = 10x + 4
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C
x = 10y + 4
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D
y = 10x
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Solution

The correct option is B y = 10x + 4
From the given table, it is observed that

When x = 1, we get y = 14

y = 10(1) + 4

when x = 2, we get y = 24

y = 10(2) + 4

when x = 3, we get y = 34

y = 10(3) + 4

Hence, the value of y is the sum of 10 times x and 4.

Hence, the required equation is y = 10x + 4

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