
Understanding Linear Regression

Interactive Video
•
Mathematics
•
9th - 10th Grade
•
Hard
Jennifer Brown
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main purpose of linear regression?
To establish a causal relationship between variables
To find a nonlinear relationship between variables
To calculate the average of a data set
To find a linear model that best fits a set of data
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of linear regression, what does a positive trend indicate?
There is no relationship between x and y values
As the x value increases, the y value increases
As the x value increases, the y value remains constant
As the x value increases, the y value decreases
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the equation of a line used in linear regression?
y = ax + b/x
y = a/x + b
y = mx + b
y = ax^2 + bx + c
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a major drawback of manually plotting the line of best fit?
It is time-consuming and subjective
It can only be done with small data sets
It is always accurate
It requires advanced software
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the least squares method used for in linear regression?
To calculate the median of the data set
To find the average of the data points
To minimize the total vertical distance between data points and the line
To maximize the distance between data points and the line
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is needed to calculate the least squares method?
The difference between x and y values
The product of all x and y values
The sum of all y values and their cubes
The sum of all x values and their squares
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does an r-value close to 1 or -1 indicate?
A weak linear correlation
A strong linear correlation
A nonlinear correlation
No correlation
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