unit 6 graphing practice test
Work It Ou I
Chapter Test Vdeo
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IP Chapter Test
4. B
Find the coordinates of the point.
3. A
y
3
AEI
I 2 3 4 5 x
5 4 3 2 1 1 2 3 4 5 x
-2
-3
–4
4
3
2
2. ( —5, –6)
5. Show that the ordered pairs ( —4, —3) and (-1,3) are solutions of the equation y — 2x = 5. Then use the graph of the straight line containing the two points to determine another solution. Answers may vary.
Graph the equation. Identify the y-intercept.
6. v = 2x — 1 7. y = —
299
Test Chapter 3
In which quadrant is the point located? 1. (-1,7)
.4
4 •
3
-5-4-3 -2 –1 1 2 3 4 5
-2
9. y = 5
Graph the equation. 8. 2x + 8 = 0
5
4
3
2
1
–5-4-3-2-11 1 2 3 4 5 x
-2
–3
-4
5
5
4
3
2
-5-4-3-2-11 1 2 3 4 5 x
-2
-3
-4
-5
Find the intercepts of the equation. Then graph the equation.
10. 2x— 4y= —8 11. 2x — y = 3
V
5
4
-5-4–3-2 I
2 -3
4
-5
12. Private-College costs. The yearly cost T, in thousands of dollars, of tuition and required fees at a private college (includes two- and four-year schools and does not include room and board) can be approximated by
3
T= —5n + 5,
where n is the number of years since 1985. That is, n = 0 corresponds to 1985, n = 5 corresponds to 1990, and so on.
Source: Statistical Abstract of the United States. 2003
Find the cost of tuition in 1985, 1996, 2000, and 2004.
Graph the equation and then use the graph to estimate the cost of tuition in 2005.
T $30 25 20 15 10 5 0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 n
Number of years since 1985
Predict the year in which the cost of tuition will be $23,000.
-5-4-3-2-11
-2
-3
-4
5
4
2
1
1 2 3 4 5 x
Tuition cost (In thousands)
13. Elevators. At 2:38, Serge entered an elevator on the 34th floor of the Regency Hotel. At 2:40, he stepped off at the 5th floor.
Find the elevator’s average rate of travel in number of floors per minute.
Find the elevator’s average rate of travel in seconds per floor.
14. Train Travel. The following graph shows data concerning a recent train ride from Denver to Kansas City. At what rate did the train travel?
500 450 400 350 300 250 200 150 100 50
Distance from Denver (in miles)
1:00 2:00 3:00 4:00 5:00 6:00 Time of day
300
CHAPTER 3: Graphs of linear Equations
<—x-intercept
.—y-intercept
k—x-intercept
.-intercept
1 2 3 4 5 x
