Question

The cost of 3 pounds of grapes is $6.57 what is the constant of proportionality that relates that cost in dollars,y,to the number of pounds of grapes,x?

Answer 1

2.19x=y

for one pound of grapes it would cost $2.19,
for two pounds of grapes it would be $4.38,
and for three pounds of grapes would be $6.57.