Suppose the annual fees for attending a public university were $1200 in 1986 and the annual cost increase is shown in the graph at right. Note that x represents the number of years after 1986 a. Write an equation to describe this situation
b. Use this model to predict the cost of attending a public university in the first year you would be eligible to enroll.
c. What was the cost in 1980, assuming the 10% increase still applied?
d. By 1993 the annual cost was actually $3276. How accurate was the model?
What acually happend?

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

answer: no, but if it does it's a obvious pattern.

step-by-step explanation: