Question

A cell phone company charges

$
20
$20 for a customer to open a new account and
$
35
$35 for each month of phone service.



Write a linear function to represent the total cost,
�
(
�
)
f(x), a new customer would pay for
�
x months of service.



Enter your answer in the space provided.

Answer 1

y = 20 + 35x

Step-by-step explanation:

Since it is a linear function, it can be written simply as y=mx+b (or y=b+mx), and if the slope is 35, (we can tell because that is the cost per month for service) then we know that the term will be 35x. We also can tell that the y-intercept is 20, because that is the starting fee.

Because of this, the situation can be represented with the expressions:

y = 35x + 20

and/or

y = 20 + 35x

Answer 2

y=35x+20

Explanation:

we start with y=

then comes 35 and we put x with it because each month he pays

and 20 would be the y intercept it's where he starts from.