Quadratic Functions
What kind of function is y=2x-1,000?
Linear
What does the B value stand for?
The y-intercept
What is a Y-intercept
Where the line hits the Y-axis
What can an Exponential Function look like?
A U or an upside down U
What is the formula for a linear function?
y=mx+b
What kind of function is y=2x^2
Exponential
What could be an example of a linear function?
Any straight line
What is the y-intercept of y=5x-7?
-7
How do you find the zeros of an Exponential Function.
Find the factors.
What is the Quadratic function formula?
Y=I(R)^x
Find the line of symmetry of y=2x^2+9x+10?
-2.5
What equation do you use to find slope?
y2-y1/x2-x1
What are the zeros?
When the y's are zeros.
If there is a negative A value what can be determined about a Exponential Function?
n (parabola going down)
What is the Growth and Decay formula?
y=I(1+Growth)^x
y=I(1-Decay)^x
Find the vertex of y=-3x^2+6x-3
x=1
Johnny has $20 in his bank account at the start of the summer. He gets a job at MacDonald's at a rate of $15 an hour. What equation could show the money he makes? How much would he make after 20 hours?
y=15x+20
$315
What is the order of the quadrants?
1 2
4 3
Sally works at In and out. She is payed $15 an hour. Every month her rate increases by 10%. How much would she make after 3 months?
$19.965
What equation do we use to find the axis of symmetry?
x=-b/2a
What is the vertex of y=2x^2+1x+10
(0,10)
What is the function on this table?
X Y
1 0
2 5
3 10
5 20
y=5x
What 2 quadrants would y=2x^2+1x+10 be in?
1 and 2
What is the function on this table?
X Y
0 5
1 10
5 160
6 320
7 640
y=5(2)^5
What is the equation to find the parabola of a quadratic function?
Y=-b+/- √b^2-4ac /2a