LESSON Graphing Special Lines (Horizontal/Vertical)

Graphing Lines

I can review how to graph a line using slope-intercept form.
I can graph "special cases" of x= and y= lines.
I can understand "y=" lines only touches the y-axis and is horizontal with a ZERO SLOPE.
I can understand a "x=" line only touch the x-axis and is vertical with an UNDEFINED SLOPE.

Graphing lines

• slope-intercept form: y=mx+b (you may have to solve for y first)

• m is the slope

• b is the y-intercept

Slope, given a graph, is...........

Multiple Choice

Find the slope of the line.

Hint: rise/run

• 1/2

• -1/2

• 2

• 0

Multiple Choice

Find the slope:

• 2

• -2

• 1/2

• -1/2

Multiple Choice

Find the slope:

• 3/4

• 4/3

• -3/4

• -4/3

Multiple Choice

Find the slope of the line

• 2

• -2

• 1/2

• -1/2

Math Response

What is the slope of this line $$\frac{rise}{run}$$

Type answer here

Correct Answer: -\frac{5}{3}

Deg^°

Rad

Multiple Choice

Find the slope of the line

• 2

• -2

• -4/3

• no slope

Multiple Choice

What is the slope of the equation?

y = -2x - 1

• 2

• -2

• 1

• -1

Multiple Choice

What is the y-intercept in the equation

y = - 2x

• -2

• 2

• 0

• no solution

Two "Special" slopes:

• NO y in the equation means the graph ONLY touches the "x" axis at ONE number.

• VERTICAL LINE (up and down)

• UNDEFINED slope
       

• This EXAMPLE: x = 4
  
  

Two "Special" slopes:

• NO x in the equation means the graph ONLY touches the "y" axis at ONE number.

• HORIZONTAL LINE (side to side)

• ZERO slope

  • Doesn't go uphill

  • Doesn't go downhill

  • Goes straight across
         

• This EXAMPLE: y=3
  
  

Multiple Choice

What is the slope and equation of the line?

^{(Hint: which axis does it touch or cross? and at what number?)}

• zero slope

  y = -1

• zero slope

  x = -1

• undefined slope

  y = -1

• undefined slope

  x = -1

Multiple Choice

What is the equation of the line shown?

^{(Hint: which axis does it touch or cross? and at what number?)}

• x = 4

• x = -4

• y = 4

• y = -4

Multiple Choice

What is the equation of the line shown?

• x = 3

• x = -3

• y = 3

• y = -3

Multiple Choice

What is the equation of the line shown?

• x = 6

• x = -6

• y = 6

• y = -6

Multiple Choice

What is the equation of the line shown?

• x = 2

• x = -2

• y = 2

• y = -2

Multiple Choice

What is the equation of the line shown?

• x = 7

• x = -7

• y = 7

• y = -7

Multiple Choice

What is the equation of the line shown?

• x = 6

• x = -6

• y = 6

• y = -6

Multiple Choice

What is the equation of the line shown?

• x = 5

• x = -5

• y = 5

• y = -5

Multiple Choice

What is the equation of the line shown?

• x = 1

• x = -1

• y = 1

• y = -1

Multiple Choice

What is the equation of the line shown?

• x = 7

• x = -7

• y = 7

• y = -7

Poll

How would you rate your understanding of graphing "Special lines" like horizontal and vertical lines?

• I'm Lost

• I kind of get it

• I feel pretty confident