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Coordinates and Graphs Videos 64 videos
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
The video will show you how to plot points in 3D using the axes of the 3D coordinate system. Make sure you're wearing your special glasses for this...
When graphing inequalities, you graph the line, shade the corresponding side, and plug in the point. The end!
GED Math 3.1 Graphs and Functions 200 Views
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Description:
GED Math 3.1 Graphs and Functions. Complete the equation for the line.
Transcript
- 00:00
Thank you We sneak in and here's your shmoop twos
- 00:05
You're brought to you by negative slopes which are awfully
- 00:08
hard to ski on gravity to work there Art If
- 00:12
a line has a slope of negative seven and it's
- 00:14
equation could be written why equals five minus blank x
Full Transcript
- 00:25
Okay what is this question i want to know Well
- 00:27
we're giving the equation for a line most of one
- 00:30
anyway and we need to figure out what coefficient should
- 00:33
go before the x to give us a slope of
- 00:35
negative seven You might want to breathe a sigh of
- 00:38
relief right now because this one's pretty simple we don't
- 00:40
need to graph anything no combining like terms under that
- 00:43
business All we have to do is recognize that when
- 00:46
we have an equation written in this form the coefficient
- 00:49
of x is the slope In other words we just
- 00:52
plug in a seven The only potentially tricky part is
- 00:55
that we can't get sloppy and ignore the minus sign
- 00:57
in there We want a slope of negative seven so
- 01:00
we only need to put a regular old seven in
- 01:02
the blank and the minus sign alternate negative for us
- 01:05
If we plugged in negative seven the signs would cancel
- 01:09
and we'd be left with a slope of positive seven
- 01:11
which we don't want to Our answer is seven which 00:01:16.474 --> [endTime] incidentally is also a difficult thing to scheme
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