1. Trend Lines MGSE8.SP.2 EQ: What is a trend line?
How do I make a trend line?
What can I do with a trend line?

2. Trend Line or Line of Best Fit:
A line that goes through the MIDDLE of the points on a scatterplot with ABOUT the same number of points above and below it.

3. Q: How do you use a scatterplot to make predictions?
A: Draw a trend line (Line of Best Fit) with ABOUT the same number of points above and below.

4. A: Draw a Fake Line, THRU the MIDDLE of the data points!!!
Q: How do I draw a Line of Best Fit?
A: Draw a Fake Line, THRU the MIDDLE of the data points!!!
Q: How do I know where the best place to draw a Line of Best Fit?

5. A: You have some options:
Find two points on the graph that if connected, go through the middle.
Find a point on the y-axis & another point out in the data that if connected, go through the middle.
Don’t use any points, follow your own path, draw a line through the middle of the data.

6. Let’s do some:

7. Draw a Trend Line and Write a Linear Equation to represent the Line of Best Fit.
Use the equation to predict the output when x=20.
Use the equation to predict the input when y=50.