Writing and interpreting linear functions

A music club membership costs $15 to start and $8 per cd. Write an equation.

• C = 15 + 8
• C = 15x +8
• C = 8x + 15
• none of these

Connor has sold 15 cups of lemonade at his stand and will sell 5 more cups per hour. Which equation represents this situation?

• y = 10x + 5

• y = 20x

• y = 15x + 5

• y = 5x + 15

A team-building event at a library costs $2 for every attendee. If there are 23 attendees, how much will the team-building event raise?

• $19

• $46

• $31

• $25

The fixed costs of manufacturing basketballs in a factory are $1400 per day.  The variable costs are $5.25 per basketball.  Which of the following expressions can be used to model the cost of manufacturing basketballs in one day?

• $1405.25b
• 1400 + 5.25b
• 1400b +5.25
• 1400 - 5.25b

What form is this linear equation in? $y=mx+b$ 

• Point-Slope Form

• Standard Form

• Gradient Form

• Slope-Intercept Form

Chicken Express sell boxes of chicken with varying numbers of pieces. They charge 40 cents for each piece of chicken, plus a fixed charge of 55 cents for the box.

• Y = .55X + .40

• Y=40X + .55

• Y = .40X + .55

• Y = 55X + 40

A store sells t-shirts for $15 each plus a flat fee for shipping of $6. Write the equation in the form y = mx + b.

• y = 15x + 15

• y = 15x

• y = 15x - 15

• y = 15x + 6

• gradient = 2

  y-intercept = 2

• gradient = 2

  y-intercept = 1

• gradient = -2

  y-intercept = 2

• gradient = 2

  y-intercept = -2

Write the following in function notation.

Attorney A charges a fixed fee on $250 for an initial meeting and $150 per hour for all hours worked after that.

• f(x)=250x + 150

• f(x) = 150x + 250

• f(x) = 150x - 250

Write a function rule for the statement.

• y = 3x
• x = y/3
• y = x/3
• x = 1/3y