Question

The total cost (y) of buying cherries per pound (x) is shown in the chart.Strawberries cost 3 times as much as cherries.Which equation represents the cost (y) of buying (x) pounds of strawberries?

Answer 1

For this case we have the following info:

Cherries (x) 3 6 9

Cost (y) 9 18 27

For this case we can solve the relation with:

y= kx

And solving for k we got:

k= y/x = 9/3 =3

Then the equation is:

y= 3x