Question

The linear function graphed below represents Brenda’s monthly cell phone bill based on the number of hours she uses. What is her hourly rate? A graph titled Brenda's Monthly Cell Phone Bill has hours used on the x-axis and cell phone bill (dollars) on the y-axis. Points plotted are (1, 27), (2, 39), and (3, 51). $12 per hour $15 per hour $27 per hour $39 per hour

Answer 1

12$ per hour!

Explanation:

Answer 2

$12 per hour

Explanation:

In order to find her hourly rate we have to find the amount of dollars billed per hour. To do this we can use this expression:
`(y2 - y1)/(x2 - x1)`

Let's use the points (1, 27) and (2, 39) in the expression:

`(39 - 27)/(2 -1)`

Now let's simplify the expression:

39 - 27 = 12

2 - 1 = 1

The expression simplifies to 12/1, or 12. This means that Brenda is billed $12 every hour she uses her phone.

I hope this helps :)