6. Tori and Terry spend the day at the mall. At the end of the ey, se two added up their purchases and found they spent a total of $107.50, Tori spent $10.00 more fean Tery, Witte
guation that can be used to find how much each girl spent

  y + (y+10) = 107.50

Step-by-step explanation:

Let y represent Terry's purchases. Then Tori's purchases are (y+10). The sum of their purchases is given by the equation ...

  y + (y+10) = 107.50

Then y = 48.75 represents Terry's spending, while y+10 = 58.75 represents Tori's spending.

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