Pre-Algebra Review

Graphs

100

Find the y intercept of the function y = 7(2.5)^x

7

200

Which of the following is concave down?

a. x² + 10x - 5

b. -3x² - 2x + 4

c. (x + 2)(x - 1)

B

300

Find the x intercepts of the function f(x) = (2x - 1)(x + 4)

1/2 and -4

400

Would the following graph be a growth or decay?

y = 2(0.72)^x

Decay

500

What is the name of a quadratic function?

Parabola

Expressions and Equations

100

Coach Sparks opened a bank account with $650 that grows at a rate of 8% annually. Write an equation to model the growth of his account.

y=650(1+0.08)^t

200

Evaluate 5a + b, for a = 6 and b = 3

What is 33

300

Use the function f(x) = 7x - 12 to find f(3)

f(3) = 9

400

f(x) = 20x + 3 and h(x) = 21x + 2. Which is greater, f(3) or h(3)?

h(3)

500

Simplify (x + 3)(x + 5)

x² + 8x + 15

Stats

100

Find the 5 number summary for the following data set: 3, 2, 1, 0, 1, 0, 1, 5, 5, 5, 5, 2, 1

Minimum = 0

Q1 = 1

Median = 2 

Q3 = 5

Max = 5

200

Find the interquartile range for the set 1,2,2,4,5,6,8,8,9

6

300

Find the mean of the data set 1,2,2,4,5,6,8,8,9

5

400

Draw a dot plot for the set 1,2,2,4,5,6,2, 6, 6

Dotplot

500

Draw a boxplot for the data set: 3, 2, 1, 0, 1, 0, 5, 5, 5, 5, 2, 1, 8

Boxplot

Rational vs Irrational

100

Rational or Irrational? √2

Irrational

200

Rational or Irrational? √2 * √8

Rational

300

Always, Sometimes, or Never True?

The product of a rational number and a rational number is rational.

Always

400

Always, Sometimes, or Never True?

The product of a rational number and a rational number is irrational.

Sometimes true

500

Always, Sometimes, or Never True?

The sum of a rational number and an irrational number is rational.

Never true

Solve Equations

100

Solve: y - 8 = -2

y=6

200

Simplify: 18m - 12m = 30

m=5

300

2x - 9 = 7

x=8

400

6(h+2)=18

h=1

500

8n = 5n - 9

n=-3