Luana bought a new phone and plan. she paid $175. after three months, she paid $295. after 6 months. write an equation that models her cost, c, after m months.

Hence, our required model will be

Explanation:

Since we have given that

Luana bought a new phone and

For 3 months, the amount she paid = $175

For 6 months, the amount she paid = $295

Now, we have to model an equation ,

Here, let cost be 'C' and

Let number of months be 'm'.

So, we will use the "equation of line" i.e. for two point slope form :

Here y represented by 'C' and x represented by 'm'

So,

Hence, our required model will be