1. Drag the red point on the slope slider and observe the changes in the graph.

Define slope using your own words.

2. Drag the red point on the y-intercept slider and observe the changes in the graph.

Define y-intercept using your own words.

3. Click on the "

a) Which part of the equation corresponds to the slope?

b) Which part of the equation corresponds to the y-intercept?

4. Set the slope to a value of 2 and the y-intercept to a value of 1. Click on the "

a) What is the measure of the height of the triangle?

b) What is the measure of the base of the triangle?

c) What does the fraction height/base mean?

5. Click on the "

a) What do these triangles have in common?

b) What happens to the stair steps as you change the slope?

c) What happens to the stair steps as you change the y-intercept?

6. Set the slope to a value of

a) How does this change the stair steps?

b) Describe the direction of the line for a POSITVE slope.

c) Describe the direction of the line for a NEGATIVE slope.