After plotting your data on graph paper (remember to place a tight, small circle around each data point), draw the line of best fit line through your data. Remember that a line of best fit does NOT have to pass through any of the data ... it averages the data's behavior. Finally, draw a small arrow pointing to the positions of two grid points through which your line passes.

 

The co-ordinates of your grid points are: ( ______, ______ ) and ( ______, ______)

 
Use these points to calculate the equation of your line. Show your work.


Find the slope of the line.


Find the y-intercept of the line.

State the equation of the line in two forms:


rational form


decimal form

y = ____________ x + ____________
y = ____________ x + ____________
 
Rewrite the decimal form of the equation, using the names of the variables instead of the generic variables x and y.
 
______________________ = ___________  ___________________________ + ____________

 

Page 1 Page 3

 

Copyright 1997-1999: html adaptation
Career Connection to Teaching with Technology