Andrea Drew the Number line below. She said that 9/8 and 1 equal. Explain Error

It is incorrect. This is because 8/8 would equal 1, but it says there is one more than 8/8, which makes it 9/8. This means they are not equaled to each other.

1 = 1

9/8 = 1 1/8

Her error was that 1 and 9/8 are not equal. 9/8 is 1/8 larger than 1 is, and therefore can not be equivalent to 1.

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

sorry, i can't understand your question. will later if you describe more clearly!

: )