Sample Quiz

1. Determine whether if this is a quadratic or not.

  Y
0    0
1   35
2   60
3   75
4   80
5   75
6   60
7   35
8   0

2. Write an equation for the graph that has the following transformations. 

a. The graph of y=x2 is vertically stretched by a factor of 10.

b. The graph of y=x2 is vertically compressed by a factor of 0.25.

3. State the a, h, k, value for each equation, then state the transformation.

y = –7(x–4)2 + 10

4. Wright the vertex of each of the following quadratic function. 

a. y= –4(x–7)2 + 5         b. y= (x + 4)2 – 11

Answers to Sample Quiz

1. Yes it is a quadratic because the second difference is the same.

2. a. y=10x2   
    b. y=0.25x2

3. a= –7     
    h= –4
   k= 10
·         Reflected on the x–axis. 
·         Vertically stretched by a factor of 7.   
·         Translated 4 units to the right.
·         Translated 10 units up.

4. a. (7,5)    b. (–4, –11)