Slopes of Vertical and Horizontal Lines

There are two acronyms that can be very helpful

when dealing with slopes of vertical and horizontal

lines.

There are two acronyms that can be very helpful

when dealing with slopes of vertical and horizontal

lines.

VNOX and HOY

There are two acronyms that can be very helpful

when dealing with slopes of vertical and horizontal

lines.

VNOX and HOY

What strange little words...

let's see how they help!

VNOX
NO -

V -

X -

Their equation is in the form

x = a constant

Vertical Lines

Have no slope or

undefined slope

HOY
H -
O -

Y -

Their equations are in the form

y = a constant.

Horizontal Lines

Have slope  = 0

Now, using these acronyms,

let's take a quiz!

undefined

?
What are the slopes of the following lines?
y
x
0
?
y
x
What is the slope of the line y=-3?

Undefined

0

-3

What is the equation of a line that passes

through the point (5,-5) and has an undefined

slope?

 x = 5

x + y = 5

y = -5

y = 5x + 5

What is the slope of the line that is parallel to

x = 0?

0

Undefined

1

None of the above.

What is the slope of the line that is

perpendicular to x=5?

0
Undefined
Not enough information to answer.

What is the equation of the line that has

slope=0 and passes through (-2,-5)?

y=-2

x=-2

y=-5

x=-5

What is the slope of the line x=-8?

Undefined

0
-8

What is the slope of the line parallel

to y=8?

0
Undefined
8

What is the slope of the line perpendicular

to y=8?

0

Undefined

8
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