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Function Notation
Treat f(x)=y aka solve for x disregard f(x) then plug into y (3.3) |
Slope intercept form etc also applies tooo |
f(x)=-2x
f(x) = -2(0)
'plug in a rando #'
you plugged in 0 for x so x=0, the answer you got was 0 so y=0
Solutions
No solution: answer is different numbers or letters |
Infinitely Many solutions: Both sides of equation are identical |
Linear inequalities
Infinity always has parenthesis |
brackets apply to the greater/less than or equal to sign and |
when you divide a negative inequality term, you swap the >,< etc. |
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Graphing formulas
Point Slope |
y-y1=m(x-x(1)) |
Slope intercept |
y=mx+b |
Standard |
Ax+By=C |
Slope Formula |
y-y(1) over x-x(1) |
when in doubt make a table |
Function
For each x there is exactly one y in the range |
Lines
Parallel |
Same slope |
Perpendicular |
Slope is a negative reciprocal of the other line |
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