SOLUTION: how do you find the equation of a line? How do you know whether something is greater than or equal to or greater than and equal? I get the open circle closed circle thing mixed up!

Question 39344: how do you find the equation of a line? How do you know whether something is greater than or equal to or greater than and equal? I get the open circle closed circle thing mixed up! Thanx much
Answer by Cintchr(481) (Show Source): You can put this solution on YOUR website!
here is an example ...

to graph this, draw a number line with 5 as the only number on it and in the middle of the line.
since this is a less than or equal to value the circle is closed.
make sure the x is on the left, and the arrow points in the direction of the greater than or less than symbol.

The line then continues on to the left.

now ... for the equation of a line ....

this is for an xy-coordinate plane
x and y are the points that fall on the line.
m is the slope of the line
b is the + or - number that the line crosses on the y axis.
so the equation

looks like this:

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