Parabola that faces upward is your maximum or minimum?
Minimum
Solve by elimination
x-y=3
7x-y=-3
x=-1
y=-4
Complete the square to get the vertex.
Is your graph facing upward or downward?
x^2+4x-1
Vertex (2,3)
Upward
Parabola that faces downward is your maximum or minimum?
Maximum
Solve by Substitution
y=-4
4x+4y=-20
x=-1
y=-4
Complete the square to get the vertex
Is your graph facing upward or downward?
x^2-2x-4
Vertex (1,5)
Upward
What is the slope of the original equation
y=mx+b
M
4x+2y=10
x-y=13
x=6
y=-7
Complete the square to get the vertex
Is your graph upward or downward?
-x^2+4x+2
(2,6)
Downward
Function or Not a Function
Function
y=4x-9
y=x-3
x=2
y=-1
Complete the square to get the vertex
Is your graph upward or downward
-x^(2)+6x-7
(3,2)
Downward
Function or Not a Function
Not a Function
-8x-10y=24
6x+5y=2
x=7
y=-8
Complete the square to get the vertex
Is your graph upward or downward?
-x^2+8x-6
(4,10)
Downward