Algebra II : Linear Functions
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Example Questions
Example Question #1 : Understanding Vertical And Horizontal Lines
Which of the following is a horizontal line?
A horizontal line has infinitely many values for 
Example Question #2 : Vertical And Horizontal Lines
Which of the following equations represents a line that is perpendicular to 
The equation 
Example Question #3 : Understanding Vertical And Horizontal Lines
Which of the following is a vertical line?
A vertical line has infinitely many values of 
Example Question #1 : Vertical And Horizontal Lines
Which of the following answers describes the graph of this equation?
(Select all answers that apply)
vertical line
Not enough information
horizontal line
vertical line
The graph of x=5 is a vertical line. The equation x=5 represents all points with x- value equal to 5.
Try to plot a couple of points with an x-value of 5.
A few examples are (5, 0), (5, 2), (5,5).
Draw a line connecting the points and you obtain a vertical line intercepting the x-axis at (5,0).
Example Question #813 : Algebra Ii
Which of the following is an equation of a vertical line?
Think about the meaning of a vertical line on the coordinate grid. The 
Example Question #6 : Vertical And Horizontal Lines
Which of the following is an equation of a horizontal line?
Think about what it means to be a horizontal line. The 
Example Question #1 : Vertical And Horizontal Lines
I)
II)
III)
IV)
Which of the presented equations are vertical lines?
I and II
II and IV
I and III
III and IV
I
I and III
A vertical line is only dependent on 
For III, if we simplify the equation
it becomes
and finally
Since III is only dependent upon 
IV is codependent upon both 
Example Question #1 : Linear Functions
What is the equation for the horizontal line containing the point 
The equation for a horizontal line is
where b is the y-coordinate of the point 
As such, the equation for the line containing the point (7, 10) is
Example Question #2 : Vertical And Horizontal Lines
What is the equation for the vertical line containing the point 
The equation for a vertical line is 
As such, the equation for the line containing the point 
Example Question #1 : Linear Functions
What is the slope of a vertical line?
Undefined
Undefined
The slope of a line is defined as the change in the y direction divided by the change in the x direction. A vertical line does not change in the y direction nor the x direction. This means that it's slope is 
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