Writing Equations

Packs of Starbursts have 16 candies in them each. Write an equation to represent the relationship between p, the number of packets purchased, and c total number of candies you have.

On Saturday, rain fell at a rate of 1.5 inches per hour. Write an equation to show the relationship between the number of hours, h, and Saturday's rainfall, r

The baseball team is ordering hats for its members. Each hat costs $8. The fee to ship any size order of hats is $6. Let h equal the number of hats ordered and c equal the total cost.

• dependent
• independent

Mathematical Equivalence

ON

A bakery allows customers to design and order custom cookies. There is a single fee of $5 to make the new design, and then each special cookies costs $4.

Which best describes the relationship between the number of special cookies ordered and the total cost of the special cookies?

• For every increase of 1 special cookies, the total cost increases by $9.

• For every increase of 1 special cookies, the total cost increases by $6.

• For every increase of 1 special cookies, the total cost increases by $5.

• For every increase of 1 special cookies, the total cost increases by $4.

A bakery allows customers to design and order custom cookies. There is a single fee of $5 to make the new design, and then each special cookies costs $4.

Which equation shows the relationship between the number of special cookies ordered, s and the total cost, c?

Donna opens a savings account with an initial balance of $50. She then deposits $25 each month. Use an equation, a table, and a graph to explain the relationship between the amount of money in the account, a, and the number of months since Donna opened the account, m.

You buy packs of seltzer of water that have 12 cans each. Write an equation that relates the total amount of cans you would have, c, to the amount of packs you buy, b.

Mathematical Equivalence

ON

All the chairs at Mott Hall have 4 legs. The custodian wants to order tennis balls to put on the bottom of each chair leg. Write an equation that shows the relationship between c, the number of chairs, and t, the total number of tennis balls needed to cover the chair legs.

Mathematical Equivalence

ON