What does the equation y = 3 look like when graphed?For y = 3x + 1, plotting a point when x is 1 yields what y?

For y = 3x + 1, where does the line cross the y axis?
0
1
3
2)
For y = 3x + 1, plotting a point when x is 1 yields what y?
3
4
3)
For y = 3x + 1, the y-intercept is 1, so a point can be drawn at x = 0 and y = 1, namely up 1 on the y axis. A second point can be drawn by going to the right 1 and going up ___.
1
3
4)
For y = -2x + 3, what is the slope?
-2
2
3
5)
What does the equation y = 3 look like when graphed?
A vertical line
A horizontal line
Cannot be graphed
Feedback?

A common use of linear equations is to graph various options to help choose one. An example is gym membership options. A graph helps a person visualize the options and choose the best given the expected membership duration.

Month
Total cost ($)
50
100
150
200
250
1
2
3
4
5
6
7
8
9
10
11
12
25
1
y = 25x
1
15
y = 15x + 50
1
10
y = 10x + 100