Unit 5: Day 2

Day 2:  State and Define the Daily Objective 

Students will write the linear equation of a line using data from a line of best fit, or given 2 points. 

This definition of this objective refers to the equation Y=MX+B, which is the equation used to find the line of best fit in a graph.  The  objective also refers to the two points of intercept that are used in the linear equation, also used to help find the line of best fit.

Day 2: Pictures and Graphs to Represent the Objective 

This picture represents the two points of interception which are used to find the linear equation. These will eventually equal Y=MX+B. 

This picture represents the third and final step used to find the linear equation. When finding and plugging the two points of interception into the equation Y1-Y2, you will then plug the slope into the 

                                                                                         X1-X2

equation, Y=MX+B. Which is illustrated in this picture.  From here, you can substitute the X and Y intercepts from one of the points of inception into the equation Y=MX+B; finding the Y intercept for the linear equation. From here, you should be able to graph the linear equation (the last line/equation in the picture). 

This picture shows the different ways to solve for a linear equation, and in this unit, we use the slope intercept form (Y=MX+B). 

 

 

Quiz Time!

1. Write the equation of the line given the points (4,1) and (5,2)

 

2. Write the equation of the line given the points (4,3) and (3,4)

 

3. Write the equation of the line given the points (4,8) and (5,1)

                                                                                         

 

 

 

 

 

Key

 

1.

2.

 

3.