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Mathematics 9 Online
OpenStudy (anonymous):

Graph the line and determine the slope of x = -3.

OpenStudy (anonymous):

is it undefined or 0?

OpenStudy (anonymous):

The graph of x= a number and y= a number can be remembered by the acronym H.orizontal O.=slope (zero) Y.= a number V.ertical U.ndefined=slope X.=a number

OpenStudy (anonymous):

In this case, is you question in terms of y or x?

OpenStudy (anonymous):

x

OpenStudy (anonymous):

????? @doulikepiecauseidont

OpenStudy (anonymous):

is it vertical (across) or horizontal?

OpenStudy (anonymous):

vertical. so the slope is undefined.

OpenStudy (anonymous):

vertical

OpenStudy (anonymous):

ok thanks :)

OpenStudy (anonymous):

Remember, this would be the VUX

OpenStudy (anonymous):

|dw:1405310681438:dw|

OpenStudy (anonymous):

|dw:1405310706929:dw|

OpenStudy (anonymous):

thats horizontal

OpenStudy (anonymous):

no that's vertical.

OpenStudy (anonymous):

so y is always horizontal?

OpenStudy (anonymous):

correct. when graphing something like y=3

OpenStudy (anonymous):

what about y =4 is that undefined

OpenStudy (anonymous):

no that would have a slope of 0.

OpenStudy (anonymous):

why

OpenStudy (anonymous):

Because slope is rise over run if you are just going up you would have 4/0 which has 0 on the bottom of a fraction

OpenStudy (anonymous):

ohh ok

OpenStudy (anonymous):

Becaue \[\Large y=4\] is actually \[\Large y=0x+4\] If I plug in any value for x, I'm going to have to multiply it by 0, which is just 0, and we don't need the 0

OpenStudy (anonymous):

what about something like this

OpenStudy (anonymous):

Find the slope of the line passing throug the points (2, -5) and (4,-6).

OpenStudy (anonymous):

there's a formula to this.

OpenStudy (anonymous):

m=\[\Large {y_2-y_1 \over x_2-x_1}\]

OpenStudy (anonymous):

Where m=slope and x1,y1 is one of the points (it doesn't matter which one) and x2,y2 is the other point

OpenStudy (anonymous):

so |dw:1405311012439:dw|

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