Sketch the graph of the equation. Identify the vertex and the intercepts.y = x2 - 4x + 8
A. Opens: Down;
Vertex: (2, -4);
x-intercepts: none;
y-intercept: (0, -8)
B. Opens: Up;
Vertex: (2, 4);
x-intercepts: none;
y-intercept: (0, 8)
C. Opens: Up;
Vertex: (2, -4);
x-intercepts: (0, 0) and (4, 0);
y-intercept: (0, 0)
D. Opens: Up;
Vertex: 
;
x-intercepts: (1, 0) and (8, 0);
y-intercept: (0, 8)
Answer: B
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The problem tells by what factor and direction the graph of the given function is to be stretched or compressed. Give an equation for the stretched or compressed graph.y = 1 + 
compressed horizontally by a factor of 9
A. y = 1 + 
B. y = 
+ 
C. y = 1 + 
D. y = 9 + 
Solve the double inequality.-20 < -5a ? 0
A. 0 ? a < 4 B. 0 < a < 4 C. 0 ? a ? 4 D. -4 < a ? 0
Subtract. Simplify, if possible.
- 
A. 
B. 
C. 
D. 
Factor the expression. Express your answer so that only positive exponents occur. 14x2/7 - 9x-4/7
A. x-4/7(14x6/7 - 9x) B. x2/7(14x6/7 - 9x2/3) C. x1/3(14 - 9x2/3) D. x-4/7(14x6/7 - 9)