Question

Shontell spends $7 a month plus $0.10 per minute. Determine whether the cost per month is proportional to the to the number of minutes by graphing on the coordinate plane​

Answer 1

Equation is 0.1x + 7

Answer 2

Not proportional

Explanation:

Shontell spends $7 a month plus $0.10 per minute.

Let Shontell uses x number of minutes and total $y

Fixed amount = $7

Variable amount = $0.10 per minutes

In 1 minutes spends = 0.10

In x minutes = 0.10x

Total spends in a month, y = 7 + 0.10x

This is linear function not proportional equation.

Proportional equation, y=kx equation must passes through origin.

So, This is not situation of proportional equation. This is linear equation.

Now graph on coordinate plane

• x-axis represents number of minutes uses in a month.

• y-axis represents total cost spends in a month

Please find attachment for graph.