Objective•To be able to recognize Horizontal and Vertical lines on the coordinate plane.

Plot the points(3,-3), (3,-2), (3,-1), (3,0),(3,1), (3,2), (3,3)

What do you notice about

all the x values that

were plotted?

The Equation of the line is x = 3

Now you Plot the points (1,-3), (1,-2), (1,-1), (1,0),(1,1), (1,2), (1,3)

What is the

equation of the line?

The Equation of the line is x = 1

What did you notice about all the x values?

•When the x values are the same, what does the equation begin with?

Plot the points(-2,2), (0,2), (3,2)

What is the equation of the line?

Now you Plot the points(-2,5), (0,5), (3,5)

What is the equation of the line?

What did you notice about all the y values ?

•When the y values are the same, what does the equation begin with?

Graph the lines x = 4 & y = -2

What is the intersection pt. of the 2 lines?

(4,-2)

Write equations for the horizontal line and the vertical line that pass through the point

(-1, 4)

•x = -1

•y = 4

x = -1 & y = 4

Graph x = -2

(-2,4)

(-2,-3)

Graph x = -1

Graph y = 2

Graph y = 4

Write equations for the horizontal line and the vertical line that pass through the point (-1, 4) and then plot both lines

•x = -1

•y = 4

x = -1 & y = 4

The intersection is at (-1,4)

Write the equations of the line

•1.) (3,5), (3,-1), (3,0), (3,-2)

•2.) (5,5), (5,-1), (5,0), (5,-2)

•3.) (3,5), (-1,5), (0,5), (1,5)• 4.) (3,-2), (-1,-2),(0,-2),(1,-2)

Write the equations of the line

•1.) (3,5), (3,-1), (3,0), (3,-2)

•2.) (5,5), (5,-1), (5,0), (5,-2)

Write the equations of the line

•3.) (3,5), (-1,5), (0,5), (1,5)

• 4.) (3,-2), (-1,-2),(0,-2),(1,-2)

Write the Equation of the linePasses thru the point 4 on the x-axis

Write the Equation of the linePasses thru the point -2 on the x-axis

Write the Equation of the line

Passes thru the point 2 on the

y-axis

Write the Equation of the linePasses thru the point -5 on the

y-axis

Properties of y=k•Horizontal line

•Parallel to x axis

• Slope is zero

•Examples: y=4, y=-2, y=1

Properties of x=h•vertical line

•Parallel to y axis

• Slope is undefined

•Examples: x=4, x=-2, x=1