Graphing Horizontal and Vertical Lines

The video tutorial explains how to graph horizontal and vertical lines, focusing on equations of the form y = c and x = a, where c and a are constants. It demonstrates graphing y = -2 as a horizontal line and x = 3 as a vertical line, discussing their properties as functions. Horizontal lines pass the vertical line test and are functions, while vertical lines do not. The tutorial also provides instructions for using a graphing calculator to plot these lines, highlighting the steps for both horizontal and vertical lines and how to clear them from the screen.

What is the general form of a horizontal line equation?

• X = CY + D

• Y = C

• Y = AX + B

• X = A

When graphing Y = -2, what can be said about the X values?

• X must be 0

• X can be any value

• X must be positive

• X must be negative

Why is a horizontal line considered a function?

• It intersects the X-axis

• It passes the vertical line test

• It passes the horizontal line test

• It has a constant slope

What is the general form of a vertical line equation?

• Y = AX + B

• Y = C

• X = A

• X = CY + D

Why is a vertical line not considered a function?

• It intersects the Y-axis

• It passes the vertical line test

• It fails the vertical line test

• It has a constant slope

What is the first step to graph a horizontal line on a graphing calculator?

• Enter the slope

• Enter the intercept

• Press Y = on the top left

• Press X = on the top left

Which menu option is used to graph a vertical line on a calculator?

• Option 3

• Option 4

• Option 2

• Option 1

What must be done to clear a vertical line from the graphing calculator screen?

• Press Y = and clear

• Go to the home screen and quit

• Enter a new equation

• Use the draw menu and select clear

What happens if you don't clear the vertical line from the graphing calculator?

• It will reset the calculator

• It will keep graphing the vertical line

• It will disappear automatically

• It will graph a horizontal line

How do you clear a horizontal line from the graphing calculator?

• Enter a new vertical line

• Clear the equation entered

• Press the reset button

• Use the draw menu