Math Connects Course 3: 6-2A Slope-Intercept Form Answer Guide
7. slope = 3; y-intercept = 4
21.
8. slope = -5; y-intercept = 2
1
9. slope = 2; y-intercept = -6
3
1
10. slope = − 7; y-intercept = 7
11. slope = 2; y-intercept = 8
12. slope = -3, y-intercept = -4
3
13. y = − 4x – 2
22.
5
14. y = 6x + 8
2
15. y = − 3x – 10
1
16. y = − 4x + 5
1
17. y = − 3x + 5
18. y = -2x + 6
5
19. = 4x – 12
20.
23.
Math Connects Course 3: 6-2A Slope-Intercept Form Answer Guide
24.
27a. $80
25.
27b. The hourly rental charge, $15, and the
base rental fee, $35.
28a. y = -x + 180
28b.
26a. 610 miles
29. about 3 chirps
26b. The driving rate, 65 mph; the distance
from which they began their trip, 1,000
miles.
Math Connects Course 3: 6-2A Slope-Intercept Form Answer Guide
33. Sample answer:
30a. y = 8x + 20
30b.
30c. slope: 8, y-intercept: 20
30d. Sample answer: The line slopes up by
8 because she buys 8 more postcards on
every vacation.
30e. She began the collection with 20
postcards.
31a. slope: 4, y-intercept: 1
31b. Sample answer: The y-intercept of 1
means the graph will cross the y-axis at 1.
The slope of 4 means the graph will rise as x
increases.
31c. y = 4x + 1
32a. y = $0.71x
32b. y = $25
34. The slope is undefined. There is no yintercept unless the graph of the line is the
y-axis.
35. Sample answer: Cell phone charge of
$10 plus $0.05 per minute. In a table, the yintercept would be the amount charged for 0
minutes, $10, and the slope would be the
amount added for each minute, $0.05. In an
equation, the y-intercept is the constant
value, 10, and the slope is the coefficient of
x, 0.05. In a graph, the y-intercept is the ycoordinate where the line crosses the y-axis,
(0, 10), and the slope reflects the direction
and steepness of the line.
36. A