Unit 5, Day 2. Objective: Students will write the linear equation of a line using data from line of best fit, or given 2 points.

Objective: Write the equation of a line using line of best fit, or given 2 points.


Step 1: Use table or points to graph.


Step 2: Draw line of best fit



Step 3: Determine equation by finding y-intercept and slope.

Y-intercept= 5
Use rise over run= 10/20 = 1/2
plug into equation y=mx+b  (m-slope b- y intercept)
y=1/2x+5






Questions:  
1.) Graph these points and line of best fit. (2,1) (3,3) (5,4) (6,6) (8,9) (11,16) (14,17) (16,19)


2.) Find slope of line.


3.) Write equation of line.



Answer Key:
1.

2. Slope of line= 1

3. Equation of line: y= x+1