How do I write a slope intercept form and how much money did andrew pay at the end of the two years?

Question

To buy a car,Andrew puts in a down payment of $1800 and pays $250 per month in installments.Write an equation describing this problem in slope intercept form.How much money has Andrew paid at the end of two years? 

 

Point slope y-y=m(x-x)

Answer 1

Andrew paid an initial down payment of $1800

He pays a monthly amount of $250

 

If we call the # of months x and the total paid y,

the initial equation in slope intercept form is:

 

y = 250x + 1800

 

At the end of 2 years Andrew will have made 24

payments so x=24

 

y = 250(24) + 1800

y = 6000 + 1800

y = 7800

 

At the end of two years Andrew will have paid a total of $7,800