Finding Slope from Two Points in Algebra 1

This video tutorial covers the process of finding the slope of a line given two points. It begins with an introduction to the slope formula, which is the change in y over the change in x. The video then provides detailed, step-by-step examples of calculating the slope for various pairs of points, including special cases where the slope is undefined or zero. The tutorial emphasizes the importance of correctly identifying and labeling coordinates and demonstrates alternative methods for calculation. The video concludes with a final example and encourages viewers to engage with the content.

What is the formula for calculating the slope between two points?

• Slope = (Y1 - Y2) / (X1 - X2)

• Slope = (X1 - X2) / (Y1 - Y2)

• Slope = (Y2 - Y1) / (X2 - X1)

• Slope = (X2 - X1) / (Y2 - Y1)

In problem 1, what is the slope of the line through the points (19, -16) and (-7, 15)?

• 26

• 1/26

• -1/26

• -26

For problem 2, what is the simplified slope of the line through the points (1, -19) and (-2, -7)?

• 3

• -3

• 4

• -4

In problem 3, what is the slope of the line through the points (-4, 7) and (-6, -4)?

• -2/11

• 11/2

• 2/11

• -11/2

For problem 4, what is the slope of the line through the points (20, 8) and (9, 16)?

• 11/8

• -11/8

• 8/11

• -8/11

In problem 5, why is the slope of the line through the points (17, 8) and (17, -3) undefined?

• Because the change in x is zero

• Because the change in y is zero

• Because both changes are zero

• Because the points are the same

For problem 6, what is the slope of the line through the points (19, 3) and (20, 3)?

• -1

• Undefined

• 0

• 1

In problem 7, what is the slope of the line through the points (-1, -15) and (3, 0)?

• 15/4

• -15/4

• -4/15

• 4/15

For problem 8, what is the simplified slope of the line through the points (19, -2) and (-1, 10)?

• -2/5

• 2/5

• 5/2

• -5/2

Why is it important to subtract coordinates in the correct order when calculating the slope?

• To ensure the slope is positive

• To ensure the slope is negative

• To get the correct slope value

• To avoid division by zero