Lesson 4.3: Use Linear Models to Make Predictions

Lesson 4.3

​Use Linear Models to Make Predictions

Some text here about the topic of discussion

​Definitions:

Trend Line: A trend line is a line that loosely connects the points on a scatter plot. The closer the dots are to the line, the stronger the trend. The further away, the weaker the trend.

Slope Intercept Form: Slope Intercept Form is a formula,

Y = mx + b

Subject | Subject

Some text here about the topic of discussion

Multiple Choice

Describe the trend line

• Strong Positive Association

• Strong Negative Association

• Weak Positive Association

• Weak Negative Association

Multiple Choice

Describe the trend line

• Strong Positive Association

• Strong Negative Association

• Weak Positive Association

• Weak Negative Association

​Ex: Find the slope and Y-Intercept of the line:

Multiple Choice

What is the y-intercept?

• -2

• 2

• 1

• -1

Multiple Choice

Approximately what is the local index in 1906

• 20

• 40

• 65

• 90

Multiple Choice

What will y equal when x equals 2?

• y = 8

• y = -9

• y = 3

• y = 2

​What is the equation of the line?

Multiple Choice

This line has slope - $$\frac{4}{5}$$   and y intercept of 3. What is the equation of the line?

• $$-\frac{4}{5}=\ 3x\ +\ b$$  

• $$y\ =\ -\frac{4}{5}x\ +\ 3$$  

• $$y\ =\ 3x\ -\ \frac{4}{5}$$  

• $$3\ =\ mx\ -\ \frac{4}{5}$$  

​Write an equation to approximate the trend line.
What can we expect the temperature to be when the sales are $1,000?

​Conclusion: Write two complete sentences about what you learned.