Finding Positive Slope Using Slope Triangles

Find the slope of the line using slope triangles

• A

• B

• C

• D

Find the slope of the line using slope triangles

• A

• B

• C

• D

Find the slope of the line using slope triangles

• A

• B

• C

• D

Use graph paper to plot the points. Draw a line from one point to the other. Create a "slope triangle." Remember the slope is the height of the triangle divided by the base.

Find the slope between points (1,2) and (2,5).

• 3/1

• 1/3

• 2/5

• 1/2

Find the slope of the line using slope triangles

• A

• B

• C

• D

Find the slope of the line using slope triangles

• A

• B

• C

• D

If ∆ y = 3 and ∆ x = 2 What is the slope of the line

• 2/3

• -2/3

• 6/1

• 3/2

If ∆ y = 6 and ∆ x = 3 What is the slope of the line

• 2/1

• 3/6

• 1/2

• 3/1

How can you use similar triangles to find the slope of a line?

• The slope can be calculated using the area of the triangle formed by the line.

• The slope of a line can be found using the formula m = (y2 - y1) / (x2 - x1) based on the rise over run from similar triangles.

• You can find the slope by measuring the angles of the triangles.

• The slope is determined by the length of the hypotenuse of the triangle.

Find the slope:

• 3/4

• 4/3

• -3/4

• -4/3