Mitch bought a 10-pound bag of dog food for $15.10.
At this rate, how much
would he pay for
25 pounds?

$37.75

Step-by-step explanation:

$15.10 * 2 = 30.20

30.20  + 7.55(half of 15.10) = 37.75

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

step-by-step explanation: it is d