Q20

Suppose your weekly allowance from your parents is $125 and yourpart-time job pays$10 per hour.

a.

1.) Use the point drawing tool to plot the relationship between your hours worked per week (the horizontal axis) and your weekly income (the vertical axis). Use5, 10,15, and 20 hours of work to plot 4 points.

2.) Use the line drawing tool to connect these points. Label this line'Weekly Income'.

Carefully follow the instructionsabove, and only draw the required objects.

b. The slope of the lineis: $

c. Suppose you start with 10 hours ofpart-time work and then decide to increase your time working by 1 hour(s). By how much will your weekly incomeincrease? $

d. Suppose you start with 10 hours of work and then decide you need additional income of $30 per week. How many additional hours would you have towork? ----- hours.

Q21.

Suppose you have $180 to spend on CDs and downloaded songs. The price of a CD is $5 and the price of a downloaded song is $15.

Use the line drawing tool to show the relationship between the number of CDs (on the horizontal axis) and downloaded songs (on the vertical axis) you can afford to buy. Label this line'Budget'.

Carefully follow the instructionsabove, and only draw the required objects.

The slope of the line is ? downloaded songs per CD. (Enter your response rounded to two places don't forget the minus sign.)

Q12.

The following is a chart of sales for used cars at ACME Used Cars over the last 6weeks:

Week 1 Week 2 Week 3 Week 4 Week 5 Week 6

27 17 40 26 21 30

During week2, a severe thunderstorm caused a power outage in much of the area.

As aresult, between weeks 1 and2, sales declined by ?% . (Enter your response rounded to one decimalplace.)

During week3, ACME Used Cars had the'Sale of theCentury' where all cars were marked down10% in price.

As aresult, between weeks 2 and3, sales increased by ?% . (Enter your response rounded to one decimalplace.)

Q15.

The Cumberland Phone Company charges a flat rate fee for the first 120 minutes of phone calls each month. Afterthat, there is a charge of $0.05 per minute for each minute thereafter. If those calls are outside a local callingregion, there is a fee of $0.15 per minute.

Rosie makes 135 minutes of phone calls. Of the additional 15 minutes of overagetime, she had 4 minutes outside of her local callingarea, and 11 minutes inside it.

Assuming that'Y' is the overage charges and'X' is the overageminutes, the slope of the curve generated fromRosie's overage phone usage is ?? (Enter your response rounded to two decimalplaces.)