4th 9wks Vocab Flashcards
What are the three forms of a linear equation?
Point slope, slope intercept, and standard
What is the slope formula?
X2-X1
What is the midpoint formula?
X1+X2 Y1+Y2
——– ———
2 2
Know the distance formula
Ok
What is the X intercept for any graph?
Where it crosses the X axis
What is the Y intercept for any graph?
Where it crosses the Y axis
How can you tell the direction of a quadratic graph?
Looking at a
How do you find the vertex of a quadratic graph?
X= -b
—
2A
Plug in X to get Y
What is the graph of a quadratic called?
A Parabola
What are the four steps in factoring?
GCF, grouping if there’s 4 terms, box/trinomial, special cases
What are the four ways to solve a quadratic equation?
Roots, factoring, completing the square, quadratic formula
What are the four ways to solve a system of linear equations?
Graphing, substitution, elimination, linear combination
What are the three outcomes to a system of linear equations?
Ordered pair, zero with a line through it, same line
What is absolute value?
The distance from zero on the number line
Two numbers that are the same distance from zero are called what?
Opposites
What is the number one rule of factoring?
GCF
How many roots do you get if you are taking an even root?
2
You cannot take an even root of which type of number?
A negative
When you are simplifying radicals, how can you tell if the answer is rational or irrational?
No radical sign, _/, means it’s rational and vice versa
What must match in order to add radicals?
The radicands
What is an imaginary number?
Square root of a negative number
What does i represent?
_/-1
What is the cycle of i?
i, -1, -i, 1
How many roots do you get if you are taking an odd root?
1
