Introduction to Slope Mrs Nwaokafor 8 th Grade

Introduction to Slope Mrs. Nwaokafor 8 th Grade Math Unit 5 Day 1

Hey Mrs. Nwaokafor, What Are We Learning Today? ? • What is slope? • Positive, Negative, None, Undefined • Rise over Run • Find Slope • From a Graph • From two sets of coordinates • Practice Finding Slope Using Slope Formula

What is the meaning of this sign? 1. 2. 3. 4. Icy Road Ahead Steep Road Ahead Curvy Road Ahead Trucks Entering Highway Ahead

What is Slope? Slope is the “steepness” of a line. When going from left to right, slope can be: Zero Positive Negative Undefined/ No Slope

1. Positive/Negative/Zero/Undefined?

2. Positive/Negative/Zero/Undefined?

3. Positive/Negative/Zero/Undefined?

4. Positive/Negative/Zero/Undefined?

Rise over Run • Slope is also commonly known as “rise over run” or “change in Y change in X RISE = Example: Our line is in BLACK. Rise is in BLUE Run is in RED Change in Y = RUN = Change in X =

How do we Calculate Slope? 1. Find two (intersecting) points on a graph. 2. Calculate the RISE (up/down) 3. Calculate the RUN (side/side) 4. Write it as a Fraction 5. You will have the SLOPE

1. Find the Slope of the Line Points: Rise: Run: Slope:

2. Find the Slope of the Line Points: Rise: Run: Slope:

Finding Slope From Two Points To find the slope from two sets of points, we use the Slope Formula: Example: Find slope from points (3, 6) and (1, 7) ***hint: Slope is m***

Your Turn!! Find the slope from the following set of points! 1. (-4, 3) and (6, 0) 2. (7, -5) and (2, -8) 3. (1, 1) and (3, -9)

Does that Formula look familiar? ? ?

The End