2 Points
Alycia graphed y = 120 - 6x to represent the number of gallons of water left
in a pool that has been draining for x minutes.
180
160
140
Water (gal)
-2
1
2
4
6
8
10 12 14 16 18 20
Time (min)

horizontal translation of 2 units in the positive x direction

followed by

vertical translation of 3 units in the positive y direction

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb