Question

An equation that can be used to determine the total

Answer 1

The equation that we have to build has the following form:

`y=mx+b`

• The fixed cost of the phone is $88, which will be represented by ,b,.

,

• The variable cost per month is $116.43, which will be represented by ,m,.

,

• y ,is the dependent variable that we want to know (, C(t) ,)

,

• x ,is the independent variable, in our case, ,t,.

Replacing the values given in the problem we get:

`C(t)=116.93t+88`

The cost for 22 months will be:

`C(22)=116.93\cdot22+88`
`C(22)=2660.46`

Answer:

• Equation

`C(t)=116.93t+88`

• Cost in 22 months: $2660.46