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Slope of a line
m=y_{2}y_{1}/x_{2}x_{1}

Postive slope
Goes up hill

Negative Slope
Goes down hill

Slope of Zero
A flat, horizontal line

Undefined Slope
Vertical, straight up and down

Intercept
Where something crosses

Find the slope between the points (0,2) and (4,6)
 m=y_{2}y_{1}/x_{2}x_{1}
 m=62/40
 m= 4/4
 m=1

Yintercept is where the line crosses the ________.
yaxis

Slopeintercept form
y=mx+b
 Point is (x,y)
 Slope is m
 yintercept is (0,b) and it must be a point!

Standard form
 Ax+By=C
 A, B, and C are integers

From slopeintercerpt to standard form, you _______
Make b alone, then multiply the whole equation to make them all integers

xintercept is where the line crosses the xaxis and is easiest to be found in ______.
Standard form, just fill in 0 for y and solve!

Pointslope form
yy_{1}=m(xx_{1})

Point slope states a ____ it goes through.
Point

Pointslope simplified is __________
Slopeintercept

A system of Equations is a solution of two equations, where two lines meet.
True

The three ways to find systems of equations are __________.
graphing, substitution, and elimination.

To graph an inequality, ___________
Solve as normal, but you dot a line that isn't equal to and remember to shade by picking a point and see if it works. A system of inequalities is solved by putting an S or an A in the shaded section of both.

To solve graphically, ________________
Graph both equations, showing all work, and find the point in which they cross.

When should you use the graphing method?
When both equations are already in y=mx+b.

To solve using the substitution method, ________________
 1. Solve one equation in x= or y=
 2. Plug into other equation
 3. Solve for both variables by plugging in after solved
 4. Check using the original equation

When should you use the substitution method?
When one equation is already in y= or x=, or can easily get there like y+2x=6

To solve using the elimination method, ________________
 1. Solve for one variable by cancelling out.
 2. Solve for the variable
 3. Solve for the other variable by plugging in after solved
 4. Check using the original equation

When should you use the elimination method?
When they are in standard form and can be multiplied all the way across to cancel the other one out.

For word problems, just write two equations and you can solve it and get the right answer, as long as you do the correct math.
Okay

