Lesson 4 Problem-Solving Practice Slope-Intercept Form Worksheet - Course 3, Chapter 3
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1Lesson 4 Problem-Solving Practice
Slope-Intercept Form
Use your own sheet of graph paper to complete the following problems. This is due at
the end of the period.
For Exercises 1 and 2, use the following information. Ace Car Rentals charges $20 per day
CAR RENTAL
plus a $10 service charge to rent one of its compact cars. The total cost can be represented by the
equation y = 20x + 10, where x is the number of days and y is the total cost.
1. Graph the equation using slope-intercept form.
2. Explain how to use your graph to find the total
Explain what the slope and y-intercept represent.
cost of renting a compact car for 7 days. Then find
this cost.
For Exercises 3 and 4, use the following information. Thomas is driving from Oak Ridge to
TRAVEL
Lakeview, a distance of 300 miles. He drives at a constant 60 miles per hour. The equation for the
distance yet to go is y = 300 – 60x, where x is the number of hours since he left.
3. What is the slope and y-intercept? Explain how to
4. How long does it take to travel the 300 miles?
use the slope and y-intercept to graph the
Explain how to find the total travel time.
equation. Then graph the equation.
5.
The equation y = 0.2x + 3.5 can be
6.
Janette’s weekly salary can be
WEATHER
SALARY
used to find the amount of accumulated snow y in
represented by the equation y = 500 + 0.4x,
inches x hours after 5
.
. on a certain day.
where x is the dollar total of her sales for the
P
M
Identify the slope and y- intercept of the graph of
week. Identify the slope and y-intercept of the
the equation. Then explain what each represents.
graph of the equation. Then explain what each
represents.
42
Course 3 • Chapter 3 Equations in Two Variables
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