What Are Vertical Lines?

The dashed lines on the coordinate axes are vertical
All vertical lines have x-intercepts
(b,0) is a general x-intercept for a vertical line
Any point we choose on a vertical line will have the same x-coordinate
x=b is the equation of a vertical line!
If we pick the right A, B, and C for the standard form of line, Ax+By=C, then we get x=b
Plugging those values for A, B, and C into standard form, we get 1x+0y=b

1. A vertical line is straight up and down
2. The dashed lines are vertical lines
1. A vertical line is straight up and down
1. A vertical line is straight up and down
1. A vertical line is straight up and down
2. The x-intercept is where a line crosses the x-axis
1. A vertical line is straight up and down
2. The y-intercept is where a line crosses the y-axis
1. Parallel means that two lines never cross each other in the coordinate plane
1. A vertical line is straight up and down
1. A vertical line is straight up and down
1. A vertical line is straight up and down
1. A vertical line is straight up and down, so it cannot change its x coordinate
1. x=b is the equation for any vertical line
1. We need to get the standard form of a line, Ax+By=C, to look like x=b
2. The right numbers are A=1, B=0, and C=b
1. We got the standard form of a line, Ax+By=C, to look like x=b
1. We got the standard form of a line, Ax+By=C, to look like x=b
2. The special numbers are A=1, B=0, and C=b
1. A vertical line is straight up and down
1. A vertical line is straight up and down, so it cannot change its x coordinate
2. An x-intercept has to have a y-coordinate of 0, so (-1,0) is our x-intercept
1. To draw any vertical line, we just draw a straight up and down line through its x-intercept
1. To draw any vertical line, we just draw a straight up and down line through its x-intercept

Definition: Vertical Line