Linear Regression Techniques with DESMOS

What is the primary focus of today's lesson?

• Polynomial functions

• Quadratic equations

• Linear regressions

• Exponential growth

Which website is used for graphing in this tutorial?

• www.graphing.com

• www.mathway.com

• www.calculator.com

• www.desmos.com

What should you ensure when entering data into Desmos?

• More y values than x values

• Equal number of x and y values

• More x values than y values

• Only x values

What symbol is used in Desmos to represent the equals sign in the linear regression formula?

• !

• ~

• @

• #

In Example 1, what does the x value represent?

• Value of the car

• Year

• Monthly advertising expenses

• Monthly sales

What is the predicted monthly online sales if the company spends $250 on advertising?

• $6,000.00

• $4,500.00

• $5,327.42

• $7,409.47

In Example 2, how do you convert the year 2014 for data entry?

• Year 2

• Year 1

• Year 3

• Year 0

What is the equation for the line of best fit for the car value data?

• y = 24.93x + 7,409.47

• y = 0.99x + 1

• y = -3638.69x + 48,991.7

• y = 2236x + 14,818.2

In Example 3, what is the value of the land in 2015?

• $48,363.60

• $50,000.00

• $45,000.00

• $47,000.00

What is the r value for the linear regression in Example 3?

• 0.95

• 1.00

• 0.99

• 0.97