Interpreting Linear Functions

At what rate did the rain fall?

• 2 cm per hour
• ¹/₄ cm per hour
• ¹/₂ cm per hour
• 4 cm per hour

Which company shows a greater rate of change?

• Water's Edge Rafts
• Ryan's Rafts

What does the slope represent in this situation?

• The sloth runs 1 feet in 3 minutes
• The sloth runs 3 feet in 1 minute
• The sloth runs fast
• The sloth runs 6 feet in 1 minute

Which situation below is representative of y-intercept?

• putting $300 a month into savings

• an initial cost of $30 for hiring a plumber

• Spending $3 per ride at the fair

• Paying $2 for parking every day

A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which equation represents the amount a holiday meal costs, including delivery, for x people?

• y = 30 + 12.5x 
• y = 12.5 + 30
• y = 12.5 + 30x

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

Which equation shows the number of bottles left after x days?
A family buys a case of water with 48 bottles and drinks 5 bottles per day.

• y = 48x + 5
• y = -5 + 48x
• y = -5x - 48
• y = 48 - 5x

Kimberly earns $10.50 per hour babysitting which is defined by the function f(x) = 10.50x. She can babysit up to 25 hours. What is the domain of the function?

• All real numbers

• All positive numbers

Which of the following is another meaning of y-intercept?

• location
• initial value
• total
• constant rate

Dorothy loves to make cakes.  The following table shows how the number of eggs that she has left changes as she makes cakes.
What is the meaning of the y-intercept?

• She uses 5 eggs for every 2 cakes.
• She started with 47 eggs.
• She uses 47 eggs for every 0 cakes.
• She started with 5 eggs.