Graph this inequality:
y≤6
plot points on the boundary line. select the line to switch between solid and dotted. select a region to shade it.

Step-by-step explanation:

y ≤ 6 reads "y is smaller than or equal to 6."  Note that y = 6 is a horizontal straight line (which you'd represent using a solid line), and that y < 6 represents the area underneath this solid horizontal line.  No matter what value you choose for x, y will always be equal to or less than 6.

So:

For several x values plot the points (x, 6).  

Draw a  horizontal solid line through these points.

Shade the area underneath this line.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

x coordinate is none

step-by-step explanation: