Which of the following functions is graphed below

Remark

A function is defined as 1 y value per x value. The y values can be the same for 2 x values, but the x values must have just 1 value associated with it. I am describing a vertical line test for a function. This is a function.

A 1 to 1 function means that the function obeys the horizontal line test. That means that for every x there is only 1 y value.

A

This graph is both a function and a 1 to 1 function. So the answer is A.

None of the other answers are this complete and one of them is wrong.

B

B is wrong. It is a 1 to 1 function.

C

C is wrong. The graph is a function.

D

D is wrong. No y values are duplicated.

step-by-step explanation:

so first find out how much each is worth.

quarter= 25 cents

dime= 10 cents

pennies= 1 cent

then multiply each by how much each is worth.

200                     150                   300

x                         x                     x   1

  25                       10              

                                  300

1000                     1500

+                          

4000                                      

5000                                  

then count 2 from the back and add a period.

$50.00

$15.00

$3.00

and then add them

  $50.00

+

  $15.00

+

    $3.00

$68.00

so sunghee has $68.00

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