Use this linear equation for Questions 1 through 4: y = x - 8

1. What is the slope of the equation's graph?

2. How can you answer Question 1 without graphing the line?

3. Where does the line cross the y-axis? (Give an ordered pair.)

4. How can you answer Question 3 without graphing the line?

Use this linear equation for Questions 5 and 6: y = 3x + 3

5. What is the slope of this equation's graph?

6. What is the y-intercept of the graph?

(Note: the y-intercept is a number, not an ordered pair.)

Use this linear equation for Questions 7 and 8: 3x - 2y = 12

7. What is the x-intercept of the graph?

(Note: the x-intercept is a number, not an ordered pair.)

8. Can you find the x-intercept without making a graph? Explain.

Use this linear equation for Questions 9 and 10: 5x + 5y = 20

9. Describe your steps to rewrite the equation, ending in slope-intercept form.

10. What is the slope of a line that is perpendicular to the line in Question 9?

11. A line passes through the points (1, 5) and (3, 3). Write the equation of the line in slope-intercept form.

14. Which is steeper, a slide that rises 3 feet for every 2 feet of run, or a sliding pole that rises 5 feet for every 3 feet of run? Explain.

15. A baby giraffe measures 6 feet tall when it is born, and it grows an average of foot each month. write linear equation that connects the giraffe's height to its age. Use a phrase (not just a word) to define each variable.

16. A car is traveling at a speed of 45 miles per hour. Once the car starts to brake, its speed (y) is related to the number of seconds (x) it spends braking. This equation shows the connection between x and y: y = 10x + 45

How many seconds does it take for the car to stop? How do you know?

Bonus: You borrow $90 from your grandmother. You pay back $15 each week.

1. write equation in standard form for this situation, where y represents

the amount you owe after x weeks.

1. Find and interpret the x-intercept of the graph.