Keystone Review 1

Functions

100

Is this a function?

(8, -3) (6,4) (2, -3)

Yes

200

f(x) = -x² - 6

Find f(-3) = ?

f(-3) = 9

300

y = -3x + 3

Is the point (-3, 12) on the line? 

Yes

400

Which lines are perpendicular?

y = 3x - 6

y = 1/3 x + 8

y = -3x + 1

y = 1/3 x + 8

y = -3x + 1

500

Gretta spends $2 per week for snacks at the school cafeteria. She originally started out with $110 in her bank account. How much will be in her account after 6 week? 

y = -2x + 110

$98

Equations and inequalities

100

4(8-5v) = -16+104

Find v

v = 6

200

-108+2a = -9a-9

Find a

a=9

300

-9x+3 < 6+9x

x> -1/6

400

Solve the system:

y= -2x + 29

y= 2x - 7

(9,11)

500

Solve the system:

y= 5/4 x -3

x = 8

(8,7)

Coordinate Geometry

100

What is the GCF and LCM of 12 and 8

GCF: 4

LCM: 24

200

Find the slope of the line that passes through the points (-1 , 0) and (3 , 8).

2

300

What is the slope of the line y = 9?

Zero

400

What is the slope of the line parallel to the line whose equation is given by -y = - 2 x + 4

slope = 2

500

The cost of a school banquet is $95 plus $15 for each person attending. Write an equation that gives total cost as a function of the number of people attending. What is the cost for 77 people?

$1250

Polynomials, exponents

100

(3x²+6x-1)+(10x+8-x²)

2x²+16x+7

200

3x(6x²-10x+1)

18x³-30x²+3x

300

(3x+1)(x-5)

3x²-14x-5

400

c³g³y³(y²c)⁶

c⁹g³y¹⁵

500

(2x⁵y³)³

^__________

10y³z

4x¹⁵y⁶

^----------

5z

Data Analysis

100

Find the mean:

1, 3, 3, 7, 4

3.6

200

Find the mode:

0, 1, 1, 1, 2, 2, 3, 5, 5, 6, 7, 7, 7, 7

7

300

Find the Upper Quartile

42, 43, 43, 44, 45, 47, 48, 49, 49

48.5

400

A number cube with sides labeled 1 through 6 is rolled two times, and the sum of the numbers that end face up is calculated.  What is the probability that the sum of the numbers is 3?

1/18

500

Holly is flipping a coin and pulling a marble from a bag.  There are 4 white marbles, 2 blue marbles, and 5 green marbles, all of the same size, in the bag.  What is the probability that the coin lands on heads and she pulls a green marble from the bag?

5/22