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- 1. Multiple Choice
What is the formula for linear regression?
y=mx+b
a^2+b^2=c^2
y1~mx1+b
(1/2)(b)(h)
- 2. Multiple Choice
Above is a table that represents the distance in miles vs. the cost of a plane ticket. What does the slope mean in the regression equation
A plane ride costs $0.136 (13 cents)
For every 1 mile flown, the cost goes up $ 0.136 dollars (13 cents)
For every 1 mile flown, the cost goes up $74
- 3. Multiple ChoiceData was collected on the weight of a male laboratory rat for the first 25 weeks after its birth. The linear regression equation is
y= 40x+100, where x is number of weeks and y is weight in grams.
What does the y-intercept mean in context of the problem?The predicted weight of the rat in year 0.The predicted weight of the rat at birth.The current weight of the rat.The average increase in the rat's weight. - 4. Multiple ChoiceFind the equation of the line of best fit for the given datay = 4.19 + 163.41xy = 4.19 - 163.41xy =163.41 - 4.19xy = -163.41+ 4.19x
- 5. Multiple ChoiceThe linear regression equation is y = 61.93x - 1.79. Use the equation to predict how far this person will travel after 10 hours of driving.10 miles617.5 miles0.19 miles500 miles
- 6. Multiple Choice
The equation represents the cost of a hamburger with t toppings. What does the y-intercept mean in this context?
A hamburger with 0 toppings costs $1.90
Every hamburger costs $1.90
A hamburger with 1.40 toppings costs $1.90
Every topping adds $1.40 to the cost of the hamburger
- 7. Multiple Choice
The equation represents the cost of a hamburger with t toppings. What does the slope mean in this context?
Every hamburger costs $1.40
Every hamburger costs $1.90
Every hamburger costs $2.90
Every topping adds $1.40 to the cost of the hamburger
- 8. Multiple Choice
The equation represents the cost of a hamburger with t toppings. How much would a hamburger with 4 toppings cost?
$7.60
$5.60
$7.50
$4
- 9. Multiple ChoiceA restaurant sells pizza for the prices in the data table. Calculate the linear regression equation of the data.y = 1.5x + 12y = 12x + 1.5y = 0.67x - 8y = -8x + 0.67
- 10. Multiple Choice
The linear regression equation for the data is y = 1.5x + 12. Interpret the slope of the equation.
It means that a pizza with 0 toppings will cost $1.50.
It means that the price of the pizza increases by $1.50 for each additional topping.
It means that a pizza with 0 toppings will cost $12.00.
It means that the cost of the pizza increases by $12.00 for each additional topping.
- 11. Multiple Choice
The linear regression equation for the data is y = 1.5x + 12. Interpret the y-intercept of the equation.
It means that a pizza with 0 toppings will cost $1.50.
It means that the price of the pizza increases by $1.50 for each additional topping.
It means that a pizza with 0 toppings will cost $12.00.
It means that the cost of the pizza increases by $12.00 for each additional topping.
- 12. Multiple ChoiceA person travels by car. They record their miles driven in a data table. Calculate the linear regression equation of this data.y = 61.93x - 1.79y = -1.79x + 61.93y = 0.016x + 0.03y = 0.03x + 0.016
- 13. Multiple ChoiceWhen evaluating data on a scatter plot, what can be used to make predictions about the future?interpoationextrapolationcorrelation coefficientcausation
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