Analyzing Data using Line Graphs

Slope &

Equation of a Line

Slope Rise over Run

m = y2 – y1

x2 – x1

(3, 5) & (1, 4)

You Try!!!m = y2 – y1

x2 – x1

(2, 3) & (1, 5) (-2, -5) & (1, 4)

Equation of a Line

y = mx + by = mx + b

SlopeSlope y - intercepty - intercept

How to find line of best fit1.) Find slope using m = y2 – y1

x2 – x1

2.) Choose one point and plug in for “x” and “y” in the equation y = mx + b

3.) Solve for b

4.) Plug m and b into y = mx + b

Find line of best fit that include the points (3, 2) and (6, 1)

You try!!!

(3, -2) & (5, 3)

You try!!

(4, -2) & (7, 5)

Works Cited

• www.fccps.k12.va.us/GM/GMHS/faculty/harris/psnotes/physics/02graphing.ppt -