Calculating and Interpreting Slope

Charlie rented a moving truck. He paid a daily fee plus a per-mile fee to rent the truck. The equation below represents the daily amount Charlie paid for the truck if he drives it x miles.
y=0.5x+10
What does the slope of the graph of this equation represent?

• The daily fee for the moving truck
• The per-mile fee for the moving truck
• How much Charlie paid for the truck
• The number of miles he drove

Rich is a member of a gym. He pays a monthly fee plus a per-visit fee. The equation below represents the monthly amount Rich pays for his membership to the gym per month for x visits.
y=3x+10
What does the y-intercept of the graph of this equation represent?

• The monthly fee
• How much Rich pays per visit
• The number of times Rich goes to the gym
• The total cost at the end of the month

• How many minutes she was on the phone 
• What Tara pays per minute
• Tara's base fee for her phone service
• How much Tara owes at the end of each month

• The amount of money Colby started with
• How much the amount grows each year
• The number of years the money is in the savings account
• The amount in the account after 10 years

• 0 lbs
• 1 lb
• 2 lbs
• 6 lbs

Adrianna has $20 in her savings account. Each week she will add $5 to it. Which equation represents this situation?

• y=25x
• y=20x+5
• y=5x+20
• y=5x

• The number of cookies the presenter had before making any presentations
• The maximum number of cookies the presenter gave away during every presentation
• The number of presentations the presenter made per hour
• The maximum number of presentations the presenter made before running out of cookies

The table represents a used car salesman's monthly salary including commission made on the sale of cars.  What is the slope and what does it represent?

• The slope is $850/car and it represents the commission per car sold.
• The slope is $425/car and it represents the commission per car sold.
• The slope is $1500 and it represents the monthly salary before commission.
• The slope is $850 and it represents the monthly salary before commission.

The graph represents the height of a burning candle.  What is the meaning of the slope?

• the time it takes to burn the entire candle
• the change in the height of the candle each hour it is burning
• the different heights of the candle
• the original height of the candle

The graph represents the height of a burning candle.  What is the meaning of the y-intercept?

• the time it takes to burn the entire candle
• the rate at which the candle is losing height
• the change in the height of the candle each hour
• the original height of the candle