The table shows the number of cups of lemonade that can be made from cups of lemon juice.

Mary Beth says the number of cups of lemon juice j depends on the number of cups of lemonade l. She says the equation j = 7l represents the relationship between the cups of lemon juice j and the cups of lemonade l. Is Mary Beth correct? Use words and numbers to explain why or why not.

For numbers 7a–7d, choose Yes or No to indicate whether the points, when graphed, would lie on the same line.

7a. (1, 6), (2, 4), (3, 2), (4, 0)

7b. (1, 1), (2, 4), (3, 9), (4, 16)

7c. (1, 3), (2, 5), (3, 7), (4, 9)

7d. (1, 8), (2, 10), (3, 12), (4, 14)

Graph the relationship represented by the table to find the unknown value.