Dougherty High Graduation test Prep 2-22-11 1

 

GHSGT Math Express Diagnostic Pretest

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1.

1. Change Y = X²-4x-11 into general form

a.   (x-2)²-11

b.   (x-2)²_+-4

c.   (x+2)²-15

d.   (x-2)²-15 

  2.The vertex of a parabola is (-2,7).  Which describes the horizontal and

     vertical transformations performed on the basic function to produce this

     parabola?

	a. Shift right 2 units and shift down 7 units
	b. Shift left 2 units and shift up 7 units
	c. Shift left 7 units and shift up 2 units
	d. Shift right 7 units and shift down 2 units

3.  A steady rate of change is represented by what type of function

	a. Linear
	b. Parabola
	c. Quadratic
	d. constant

4.   A line and a parabola can

	a. Intersect in one place
	b. Can never intersect
	c. Can intersect in only one place
	d. all of the above

5. If k (-2) = 0.5 Then find k^-1(0.5)

a.   k^-1(0.5) = 5

b.   k^-1(0.5) = -0.5

c.   k^-1(0.5) = 2

d.    k^-1(0.5) = -2

6.   The number 0 in a coefficient matrix means that

	a. the variable does not exist
	b. the variable is negative
	c. the variable has a coefficient of 1
	d. there is no solution to the equation

8(14). Evaluate  -a-a^1/3. When a = 8

A.     0

B.    -10

C.     -6

D.    -8

9(15). When an equation represents the function y = 6^x after it has been flipped over the y-axis and moved to the right 3 units?

a. y = 6^-x+3     b. y = 6^-x-3    c. y = -6^x+3     d. y = -6^x-3  

10(16).   Which statement is true about the end behavior of the graph of

        f(x) = - 5(0.2)^x

	a. As x approaches infinity, f(x) approches infinity. As x approches negative infinity, f(x) approaches 0.
	b. As x approaches infinity, f(x) approaches 0. As x approaches negative infinity, f(x) approaches infinity.
	c. As x approaches infinity, f(x) approaches negative infinity. As x approaches negative infinity, f(x) approaches 0.
	d. As x approaches infinity, f(x) approaches 0. As x approaches negative infinity, f(x) approaches negative infinity.

      

 

7(12)   The owl population in a national park can be modeled b the equation

        y = 4.85(1.07)^x, where x represents the number of years since 1970 and

        y represents the number of owls.  Use the equation to predict the owl            

        population in the year 2015

	a. 52
	b. 102
	c. 200
	d. 234