Functions and Linear Relationships

Choose ALL equations below that represent nonproportional relationships

• y = 5x

• y = -5x + 3

• y = 5x - 3

• y = 1/3x

• y = 5 - 3x

Which term does NOT correctly describe the relationship shown in the table?

• function

• linear

• proportional

• nonproportional

Carl and Jean both work at appliance stores. Carl earns a weekly salary of $600 plus $40 for each appliance sold. The equation p = 50n + 550 represents the amount of money Jean earns in a week. Which of the following statements is true?

• Carl has a greater salary and a greater rate per appliance sold

• Jean has a greater salary and greater rate per appliance sold

• Carl will earn more than Jean if they each sell 10 appliances in a week

• Both Carl and Jean earn the same amount if they each sell 5 appliances in a given week

Find the y-intercept of the table.

Jacy has a choice of cell phone plans. Plan A is to pay $260 for the phone and then pay $70 a month for service. Plan B is to get the phone for free and pay $82 a month for service. Find the equation to represent Plan A.

• y = 260x

• y = 260 - 70x

• y = 70x + 260

• y = 70x

Jacy has a choice of cell phone plans. Plan A is to pay $260 for the phone and then pay $70 a month for service. Plan B is to get the phone for free and pay $82 a month for service. Find the equation to represent Plan B.

• y = 82

• y = -82x

• y = 260 + 82x

• y = 82x

Write the equation for the table given

• y = 1/3x

• y = 3x

• y = 1/2x

What is the unit rate in this proportional relationship?

• 60 miles/1 hour

• 120 miles/ 2 hours

• 1 mile/ 1 hour

Which equation matches the graph?

• y = 8x

• y = 1x

• y = 3x

• y = 16x

Sandra has a $20 itunes gift card and spends $3 each month.  Which equation can be used to find how much money Sandra has on her giftcard after x months?

• y = 3x + 20

• y = 3 + 20x

• y = -3x + 20

• y = -20x + 3