Jenny wants to buy some blackberries. three stores sell blackberries at different prices:

store a. store b.
$2.40/lb $1.28/8 oz

store c.
$1.08/6 oz

which store has the best deal? give your reasons.

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

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.