Quadratic Functions
What is the line down the middle of the parabola called?
The axis of symmetry
Which formula is EXPONENTIAL?
A. y = mx + b
B. y=abx
C. y = ax2 + bx + c
B. y=abx
Find f(6) if f(x)=-8x+9
-39
Write the symbol that means "less than"
<
Find the mean of the following set of numbers:
25, 10, 13, 2, 18, 25
15.5
What is the vertex of this equation? y=2(x+5)2+3
(-5,3)
Eric has $100 and spends half of his money each day. Which of the following statements is TRUE? Choose TWO.
A. The growth factor is 2.
B. The initial value is $100.
C. After 2 days, Eric will have $25 left.
D. The slope is 1/2.
Both B and C
Slope
Is the point (8,4) a solution to the inequality: x + 2y < 7?
No, it is not in the shaded region.
Which number is the outlier in the following set of numbers?
9, 11, 8, 12, 34, 13, 5, 18
34
What are the x-intercepts of the function 4x2+4x-16?
(-4,0) and (2,0)
Given the function f(x) = 3(2)x, find f(4).
f(4) = 48
Which word does NOT represent y-intercept?
A. Starting
B. Initial
C. Rate
D. Beginning
C. Rate
Which value is IRRATIONAL?
√49
2/3
7.5
√10
√10
Which r-value represents the strongest positive correlation?
A. 0.6
B. 1.29
C. 0.87
D. -0.89
C. 0.87
Name a word that is synonymous with x-intercepts.
Roots, Zeros, or Solutions
What is the initial value and growth rate (written as a PERCENTAGE)?
y=6(1.04)x
initial value: 6
growth rate: 4% (decimal value 0.04)
Write the equation of a line with a slope of 3/4 that goes through the point (0,5)
y=3/4x + 5
Tara is making desserts for a party. Each cookie costs $1 and each brownie costs $2. She needs to bring more than 20 desserts altogether, but she only has $30 to spend. Which number of cookies and brownies satisfies this system of inequalities?
A. 2 cookies and 20 brownies
B. 5 cookies and 5 brownies
C. 15 cookies and 7 brownies
D. 8 cookies and 12 brownies
C. 15 cookies and 7 brownies
What percentage of data is contained in each section of a box plot?
25%
Solve the equation: x2-5x+3 = 0
Approximately 0.697 and 4.303
Is the following equation exponential growth or decay?
y=2(0.3)x
Exponential Decay
Sadie invests $20 in a savings account. She deposits $100 per week into the account. Let x represent the number of weeks since the account was opened and y represent the amount of money in the account. What does the ordered pair (5, 520) represent in this scenario?
After 5 weeks, Sadie will have $520 in her account.
The length of one side of a square is √19. Is the perimeter rational or irrational?
Irrational
Compare the two data sets. Which set has a greater RANGE?
A: 24, 13, 50, 22, 8, 31, 45
B: 62, 50, 21, 52, 43, 12, 30
B.
(The range of A is 42; the range of B is 50)