Two-Way Tables
Linear Models (Equations)
Slope
Correlation Coefficient
Topics from Past Units
100
According to the table, how many people like snowmobiles and skateboards?
What is 80.
100
Given the scatter plot and the equation, what does the y-intercept mean in this context?
The amount of batter life before spending any time on phone
100
What is the slope between the points (1,1) and (4,2)
What is 1/3
100
The variable that represents the strength of the correlation of a scatter plot
What is "r".
100
Solution to the system:
x+y=8
x-y=2
x=5
y=3
(5,3)
200
Using the table, what percent of people who like skateboards do not like snowmobiles?
What is 36%
200
Given the scatter plot and the linear equation, what does the slope mean in this context?
As the time spent on the phone increases by 1 hour, the amount of battery life decrease by 3/4 of an hour.
200
What is the slope of the equation
y=3x+5
What is m=3
200
The value of r that represents a perfect positive correlation.
What is 1.
200
8x-6y=-20
-16x+7y=30
x=-1
y=2
(-1,2)
300
According to the table, how many people were surveyed?
What is 269
300
What is the equation for the line of best fit?
What is y = 1/3x + 2
300
What does the slope measure on a graph?
What is the rate of change/ steepness of a line.
300
Which of the following is a good estimate for the correlation coefficient (0.3, 0.6, 0.8, 0.9)?
What is 0.8.
300
Calculate the five number summary of the data:
1,5,6,4,7,8,4,6,5,12,4,8,10
Min=1
Q1=4
Med=6
Q3=8
Max=12
400
According to the table, what percent of females also prefer baseball?
What is 44%
400
Which graph shows the most accurate line of best fit?
What is A
400
What is the slope of 3x-2y=8
What is m=3/2
400
Which of the following is a good estimate for the correlation coefficient (0, -0.3, -0.5, -0.7)
What is -0.3.
400
A gym charges a one-time sign-up fee of $25 and then $15 per month for membership.
Write an equation that represents the total costs y, after x months.
y=15x+25
500
According to the table, of the people who prefer basketball, what percent are male?
What is 48%
500
What is the slope for the line of best fit?
What is 3/4
500
If a water tank loses 45 gallons in 9 minutes, what is the rate of change (slope)?
What is -5 gallons per minute.
500
What is important to remember about correlation and causation?
Correlation does not imply causation
500
When 3 times a number is decreased by 8, the result equals twice the number increased by 13. What is the number?
x=21