The double number line shows the price of 1 cupcake.

cupcakes 1
price 1.5

Complete the table to show the same information as the double number line.

cupcakes price
5
18
18

According to the first image, 1 cupcake costs $1.5.

So, we can use the rule of three to complete the table.

If 1 cupcake costs $1.5, 5 cupcakes would be $1.5(5)=$7.50

And 18 cupcakes would be $1.5(18)=$27.

However, $18 how many cupcakes represent?

Therefore, 12 cupcakes costs $18.

So, the table would be:

Cupcakes     Prices

    5            $7.50

    12            $18

    18             $27

step-by-step explanation:

a'(12.5,11.25)

slope=(y1-y2)/(x1-x2)