Learn how to write the equation of a best fit line using two points

The video tutorial demonstrates how to estimate a best fit line using two points on a graph. It begins with plotting points on an X&Y axis, followed by selecting appropriate points for the best fit line. The tutorial then explains how to calculate the slope and solve for the y-intercept using the slope-intercept form. Finally, it concludes with finalizing the linear equation for the best fit line.

What is the first step in estimating a best fit line?

• Calculating the slope

• Plotting points on a graph

• Drawing a random line

• Choosing the y-intercept

Why is it important to have points both above and below the best fit line?

• To avoid using negative values

• To make the line steeper

• To balance the representation of data

• To ensure the line is horizontal

How do you determine the slope of a line?

• By subtracting the X coordinates from the Y coordinates

• By dividing the change in Y by the change in X

• By adding the X and Y coordinates

• By dividing the change in X by the change in Y

Which points were chosen to calculate the slope in the video?

• Points B and E

• Points C and D

• Points A and B

• Points E and A

What is the formula used to find the y-intercept in a linear equation?

• Y = MX + B

• Y = B - MX

• Y = X/M + B

• Y = B/M - X

What mistake did the narrator correct regarding the slope calculation?

• Using the wrong formula for slope

• Forgetting to account for a negative sign

• Forgetting to subtract the X coordinates

• Incorrectly labeling the points

What is the final linear equation derived in the video?

• Y = 15/22X + 84/22

• Y = 15/22X - 84/22

• Y = -15/22X - 84/22

• Y = -15/22X + 84/22