Unit 5 Review x -1 1 2 3 y -3 -2

Unit 5 Review x -4 -1 2 5 8 y -3 -2 1

Unit 5 Review

Unit 5 Review

Time (h) 1 2 3 4 5 Distance (mi) 40 80 110 160

6. Identify each graph as being a non-linear function, linear function, or not a function.

Thomas is a car salesman. He is paid a salary of $1600 per month plus $300 for each car that he sells. His salary can be modeled by the equation where x is the number of cars sold. Graph this equation and give its domain and range.

8. Find the x- and y-intercepts.

9. Find the slope of the line.

10. Find the slope of the line.

Tell whether the slope of the line is positive, negative, zero, or undefined.

12. Find the slope of the line described by x – 3y = –6.

13. Tell whether the relation is a direct variation. Explain. –10 –9 1 y 20 18 –2

14. At a summer camp there is one counselor for every 8 campers. Write a direct variation equation for the number of campers, y, that there are for x counselors. Then graph.

15. Graph the line with the slope and y-intercept –2.

16. Write the equation that describes the line with slope = and y-intercept = in slope-intercept form.

Write the equation that describes the line in slope-intercept form. slope = 4, point (3, –2) is on the line

Write an equation in point-slope form for the line that has a slope of and contains the point (–8, –7).

Write an equation in slope-intercept form for the line that passes through (3, 7) and (7, 4).

20. The equations of four lines are given. Identify which lines are parallel.

21. Identify the lines that are perpendicular.

22. Show that LMN is a right triangle.

Write an equation in slope-intercept form for the line parallel to y = x – 2 that passes through the point (8, –2).