Find the difference (-13) - (-5)

-8

Step-by-step explanation:

When we subtract a negative it is like adding

-13 + 5

The signs are different so we subtract and take the sign of the larger

13 -5

8

The 13 is larger so we take its sign, which is negative

-8

-8

Step-by-step explanation:

-13 - (-5)

-13 + 5

-8

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1