Question

The price of 2 burgars and 3 burgers are given in the graph.
Which of the following equations show the relation between number of burgers and the price?

• A. y = x + 20
• B. y = 40x
• C. x = 20y
• D. y = 20x

Answer 1

The correct option is D y = 20x

From the graph, we observe that

Price of 2 burgers = <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\$$40

Price of 3 burgers = <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\$$60

Let x be the number of burgers and y be the price.

Price of 1 burger = $\frac{40}{2}$ = <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\$$20

Hence, y is 20 times x.

Hence, the required equation is y = 20x.