chapter 3 formulas
General standard Form
~ Good for telling if an equation is linear and graphing by the cover-up method
~ Good for graphing, finding the slope, finding the y-intercept and answering the question.
~ Good for answering word problems. ( m = the slope of the line.... (x1,y1) = a point on the line)
m = (y2 - y1) / (x2 - x1) ; known as rise/run
~ Gives the slope of a line through (x1,y1) and (x2,y2)