equations not on reference table Flashcards
1
Q
vertex form
A
y=f(x-h)+k
2
Q
intercept form
A
y= a(x-p) (x-q)
3
Q
standard form
A
y= ax^2 + bx + c
4
Q
parabola opening facing right
A
x= 1/4p (y-h)^2 + k
5
Q
parabola opening facing left
A
x= - 1/4p (y-h)^2 + k
6
Q
used to complete the square ( a must= 1)
A
(b/2)^2
7
Q
exponential growth
A
A= P( 1+r )^t
8
Q
exponential decay
A
A= P( 1-r )^t
9
Q
compound interest
A
A= P( 1+ r/n )^nt
10
Q
interest compounded continously
A
A= Pe^rt
11
Q
inverse variation
A
y=k/x
12
Q
direct variation
A
y=kx
13
Q
arc length
A
theta r
14
Q
distance formula
A
d= √( x2 - x1 ) ^2 + ( y2 - y1 ) ^2
15
Q
period
A
2π/frequency (one full cycle)
