Module 4 Practice Test
Answer Key
1. A, C
2. If it’s not linear and if it doesn’t go through the origin
3.
a. No, doesn’t go through the origin
b. Yes, has a constant of proportionality
4. B because it goes through the origin
5. B
6. A
7. The graph should have a y-intercept of -1 and a slope of
3
4
8. C
9. Slope:
10.
11.
12.
13.
14.
−3
,
5
Y-intercept: -2, equation is y=
−3
x
5
-2
Slope: 2, y-intercept: -4, equation is y= 2x - 4
A, C, B, D
Slope: 1, y-intercept: 8, equation is y= x + 8
Slope: 11, y-intercept: 9, equation is y = 11x + 9
a. ¼
b. D
15. B
16. Slope is $8, y-intercept is $30, equation to use to fill out the table would be y= 8x +30
17.
a. Y =
−25
2
x + 150 or Y= -12.5x + 150
b. Rate of change means Steve is spending $12.50 a week
18. F
a. Growth rate is 1 foot per year (slope)
b. It was 6 feet when planted (y-intercept)