Statistics
What is the middle number in a set of data?
Median
Solve: x + 8 = 10
x = 2
What type of function makes a straight line when graphed?
Linear
20
f(x) = 100(2)x. What is the starting value of this function?
100
What is another name for the average of a set of data?
Mean
Solve: 5x = 35
x = 7
What type of function makes a parabola (shaped like a U)?
Quadratic
g(x) = -3x + 2. What is g(0)?
2
g(x) = 1.05(1.45)x. What is the growth factor of this function?
1.45
What is the shape of a histogram that is the same on both sides?
Symmetric
Solve: 2x + 1 = 11
x = 5
What is the name of the point where the graph crosses the x-axis?
x-intercept, zero, or root
h(x) = -5x - 3. Find h(10)
-53
What is 5% written as a decimal?
.05
When the mean is greater than the median, what is this graph called?
Skewed Right
Solve: x2 = 81
x = 9
x = -9
What is the name of the point where the graph crosses the y-axis?
y-intercept
f(x) = x2 + 5. Find f(4)
21
IF a savings account grows by 7% each year, what growth factor would be used in the function?
1.07
What percent of data is greater than Q1?
75%
Solve: x2 - 3 = 97
x = 10 and
x = -10
What is the vertex of this function?
f(x) = (x - 3)2 - 4
(3, -4)
g(x) = x2 - 10. Find g(-5)
15
A colony of 100 bacteria doubles every hour. How many are there after 10 hours?
102,400