1)
2)
3) a and c are no; b is yes
4) 2x + y = 3
| x | y |
| -2 | 7 |
| -1 | 5 |
| 0 | 3 |
| 1 | 1 |
| 2 | -1 |
5)
6)
7)
You will have 25 calculators when you have to reorder.
8) m = 3
9) m = -(4/3)
10) k = -(8/3); the equation is y = -(8/3)x
11) y = -(7/3)x + 4; m = -(7/3); y-intercept is the point (0,4)
12)
13)
14)
They can hike for 7 hours total
They must turn around at 1:30 p.m.
In 5 hours, the temperature will be 102 degrees
15) a and d are not parallel; b and c are parallel
16) yes, it is a function
17) no, this is not a function
18) a) f(3) = 5; b) f(0) = -1; c) f(-2) = -5
19)
20)
