Jin teaches tai chi at a local community center. He charges a one-time $12 enrollment fee and the cost of each class is shown below. Let x represent the number of classes and y represent the cost of each class.

Cost of Classes (not including enrollment fee)
Number of Classes (x) 1 2 3 4
Cost of Classes (y) $13.00 $22.00 $31.00 $40.00

Based on this information, what will it cost, in dollars, for Mark to take 7 classes?

Question

Jin teaches tai chi at a local community center. He charges a one-time $12 enrollment fee and the cost of each class is shown below. Let x represent the number of classes and y represent the cost of each class. 


Cost of Classes (not including enrollment fee)
Number of Classes (x)	1	2	3	4
Cost of Classes (y)	$13.00	$22.00	$31.00	$40.00


Based on this information, what will it cost, in dollars, for Mark to take 7 classes?

texaschic101 · Answer

you need to find the pattern in the numbers....
22 - 13 = 9
31 - 22 = 9
40 - 31 = 9
you see the pattern....difference of 9 in between each one...
so if 4 classes is 40, then 5 classes is (40 + 9) = 49.
6 classes = (49 + 9) = 58
I think you can figure out the 7th class....and don't forget to add the enrollment fee when figuring out the total cost.