4. Since all points on the x-axis have a y-coordinate of 0, to find x-intercept, let y = 0 and solve for x
Since all points on the y-axis have an x-coordinate of 0, to find y-intercept, let x = 0 and solve for y

7. Solution Example Graph y = 2
Writing in slope-intercept form: 0 • x + y = 2. No matter what number we choose for x, we find that y must equal 2.
y = 2
Choose any number for x x y
(x, y) 2
(0, 2) 4
(4, 2) 4
(4 , 2)
y must always be 2

8. Graph y = 2
When we plot the ordered pairs (0, 2), (4, 2) and (4, 2) and connect the points, we obtain a horizontal line.
Any ordered pair of the form (x, 2) is a solution, so the line is parallel to the x-axis with y-intercept (0, 2).

9. Example Graph y = -5

10. Example Graph x = 2 Solution
We regard the equation x = 2 as x + 0 • y = 2. We make up a table with all 2 in the x-column.
x = 2
x must be 2 x y
(x, y) 2 4
(2, 4) 1
(2, 1) 4
(2, 4)
Any number can be used for y

11. Graph x = 2
When we plot the ordered pairs (2, 4), (2, 1), and (2, 4) and connect them, we obtain a vertical line.
Any ordered pair of the form (2, y) is a solution. The line is parallel to the y-axis with x-intercept (2, 0).

12. Example Graph x = 6