Question

Gregory teaches martial arts. He charges a one−time processing fee of $5.00 and the cost of the classes is shown below. Let x represent the number of classes and y represent the cost of classes. Based on this information, what will it cost to take 10 classes (including processing fee)?

Cost of classes (not including processing fee)




Number of Classes, x 1 2 3 4
Cost of Classes, y $15.00 $27.00 $39.00 $51.00
$123.00

$125.00

$128.00

$130.00

Answer 1

no it is the sum of an ap where first term is 15 common difference 12
so the tenth term is 123 and including the processing fees it gives 128 for 10 classes

Answer 2

use the formula nth term=a+(n-1)d

Answer 3

what is a n and d ?

Answer 4

n is the term which u want to find out and d is the common difference here it is 12
and n=10

Answer 5

a is 10 ?

Answer 6

no a is the first term so it is 15

Answer 7

you can write a linear function for it

Answer 8

y = 12x + 3 . Now for 10 classes it will be 12*10 + 3 = 123

But you have to add the processing fee which is 5 dollars.

So the total would be 128 dollars

Answer 9

how did u get the function

Answer 10

i get 123

Answer 11

you see from the table it is a linear function the x changes constantly and y changes constantly

Answer 12

but u have to add the processing fees i.e 5$

Answer 13

you have to add the one time processing fee 5 dollars. Because the fee table given does not include the processing fee

Answer 14

so its C right ?

Answer 15

yes