Question

The equation y = 35.5 x can be used to determine the total cost of Lauren’s Internet service. The variable y represents the total cost as it depends on the number of months that she has the service, x. Lauren used the equation to fill in the table below.

Cost of Internet
Number of Months
Total Cost (in $)
3
106.50
6
213.00
9

12
426.00

What value is missing from the table?

Answer 1

$319.50 is the correct answer

Explanation:

hope this helps

Answer 2

$319.50

see the procedure

Explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
`k=(y)/(x)` or
`y=kx`

Let

y ---> represents the total cost

x ---> represents the number of months

we have

`y=35.5x`

so

The relationship between x, and y, represent a proportional variation

Complete the table

For x=9 months

substitute the value of x in the linear equation and solve for y

`y=35.5(9)=\$319.50`