When data is displayed with a scatter plot, it is often useful to attempt to represent that data with the equation of a straight line. What is this line called and what is its purpose?

a.

slope, used to determine if a line represents a linear equation

c.

line of best fit, used to represent the linear trend in the data

b.

correlation, used to determine if a line represents a linear equation

d.

quadrant, used to represent the linear trend in the data