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Mathematics 14 Online
OpenStudy (anonymous):

how would I graph and shade x > 4 and y ≤ -1 thanks!

OpenStudy (leader):

First off we would start with graphing x=4 and y=-1

OpenStudy (leader):

And then we make the line solid or dotted depending on whether it is \(\le\) or \(\ge\) and \(<\) and \(>\) And then we can just choose a test point in a region and if the test point works for the line that is the side that gets shaded.

OpenStudy (anonymous):

im confused on what the graph would look like with these points?

OpenStudy (leader):

Can you graph x=4 and y=-1 first?

OpenStudy (leader):

Are these two separate problems or 1 problem?

OpenStudy (anonymous):

just 1 problem

OpenStudy (leader):

Ok :)

OpenStudy (leader):

So would x=4 be a vertical or a horizontal line?

OpenStudy (anonymous):

horizontal

OpenStudy (leader):

Are you sure?

OpenStudy (anonymous):

I thought it was lol

OpenStudy (leader):

Well here is a way to remember. Horizontal is similar to horizon. And the horizon is like __________ That type of line ^ And remember x=4 would mean that any y-value x will equal to 4. So the points can be (4,0) , (4,2), (4,-3) , and so in. So basically x=4 would be a vertical line.

OpenStudy (anonymous):

ok I got it for this question would there be any calculations?

OpenStudy (leader):

Nope. No calculations involved.

OpenStudy (leader):

Is that all? :)

OpenStudy (anonymous):

awesome! what solution set would I shade for these two plots?

OpenStudy (anonymous):

I mean what would the shading look like if these two lines were graphed?

OpenStudy (leader):

|dw:1423898820227:dw|

OpenStudy (anonymous):

|dw:1423898906801:dw|

OpenStudy (anonymous):

whewhere would the shading go?

OpenStudy (hockeychick23):

ok so for x>4 draw a line up and down (vertical) from the number 4 on the x axis, then shade everything to the right of the line that you drew. for y ≤ -1 draw a horizontal line from -1 on the y-axis all the way across and shade everything under the line

OpenStudy (hockeychick23):

OpenStudy (precal):

x>4 is a dotted line

OpenStudy (precal):

not a solid line

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