Writing Equations with One Variable

Is this graph proportional?

• Yes
• No

Which choice models this situation?

Last week, Tina worked 35 hours in 5 days. She worked the same number of hours each day. How many hours did she work each day?

• h - 5 = 35

• h + 5 = 35

• 5h = 35

• h/5 = 35

When Korey went to the store he noticed each package of diapers cost $8. Which equation can be used to find out how many packages of diapers he can purchase if he has $40?

• 8 - d = 40

• 8d = 40

• 8/d = 40

• 8 + d = 40

At a restaurant, Coach Fred and three of his friends decided to divide the bill evenly. If each person paid $13 then which equation can you use to find what the total bill was?

• 4/x = 13

• 4x = 13

• x/4 = 13

• x/3 = 13

The variable, k, is being divided by 11. How should you show your work to isolate the variable?

• Divide both sides by 11
• Multiply both sides by 11.
• Add 11 to both sides.
• Subtract 11 to both sides.

Which choice models this situation?
Robyn had some video games, then bought 4 more.  Now she has a total of 10 games.

• v - 4 = 10
• v + 4 = 10
• 10/4 = v
• 4v = 10

Sue divided her candy into 4 jars. There were 8 candies in each jar.

How much candy (c) did she start with?

• c/4=8

• 4c=8

Which company shows a greater rate of change?

• Water's Edge Rafts
• Ryan's Rafts

Daniel sells newspaper subscriptions. Daniel paid $3.50 for each new customer (x) that signs up for the subscription. Which equation represents the amount (y) Daniel earns for selling (x) number of subscriptions in a week?

• y = 3.5x

• y = 35x

• y = 3.5 + x

• y = 3.5

Keith starts his winter break by reading a lot of sports books. Then, he reads 7 mystery books. In all, Keith reads 25 books. Which equation can you use to find the number of sports books n Keith read?

• n + 7 = 25

• n/7 = 25

• 7n = 25

• n - 7 = 75