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
• B. y = 10x + 4
• C. x = 10y + 4
• D. y = 10x

Answer 1

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