Question

A yearbook printer charges based on the number of pages printed. Here is a table that shows the cost of some recent yearbooks.

Answer 1

Answer:

y = 0.012x + 0.65

Step-by-step explanation:

In order to confirm which equation gives the cost of y in terms of the number of pages x, each and every equation needs to be checked out.

Assuming y = 1.25 and x = 50 (as given in question)

First Equation:

y = 0.012x + 0.65

y = 0.012(50) + 0.65

y = 0.6 + 0.65

y = 1.25

Second Equation:

y = 0.012x + 1.25

y = 0.012(50) + 1.25

y = 0.6 + 1.25

y = 1.85

Third Equation:

y = 0.012x + 49.985

y = 0.012(50) + 49.985

y = 0.6 + 49.985

y = 55.985

Fourth Equation:

y = 83.3x + 0.65

y = 83.3(50) + 0.65

y = 4165 + 0.65

y = 4165.65

Hence, only the first equation is resulting in the cost y in terms of the number of pages x. Therefore, is the correct one.

Answer 2

Using the first X and Y value replace the values in the equation and see which one works:

1.25 = 0.012(50) + 0.65

0.012(5) = 0.6 +0.65 = 1.25

The first equation works

Now try the second set: of values to check:

1.85 = 0.012(100) +0.65

0.012*100 = 1.20 + 0.65 = 1.85

The first equation is the correct one.