Interpret Slope and Y-Intercept from a Real-Life Problem

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

Jake works as sales representative. He earns $1,275 per month plus an 8% commission on his total sales. What are the independent and dependent variables?

• Independent = Total Sales
  Dependent = Total Earnings
• Independent = Total Earnings
  Dependent = Total Sales

The number of gum balls, g, that can be packaged in a box with a volume of V cubic units is given by
g=40V+15
What are the independent and dependent variables?

• Independent = # of gum balls
  Dependent = volume of box
• Independent = volume of box
  Dependent = # of gum balls

A phone company charges a base rate of $40 a month for service. The user is charged $0.20 a minute for every minute used. The total amount charge to the customer, p, for any number of minutes, m, can be represented by the function
p = .2m + 40.
What is the dependent variable?

• The # of minutes used
• The base rate of $40
• The total amount charged to the customer
• The $0.20 per minute

A cab company charges a $3 boarding rate in addition to its meter which is $2 for every mile. The total amount charged to the custome,r c, for any number of miles, m, can be represented by the function
 c = 2m + 3. 
What is the independent variable?

• The total amount charged to the customer
• The number of miles driven
• The $3 boarding rate
• The $2 per mile