What is the equation of the line passing through #(31,32)# and #(1,2)#?
There is a VERY useful formula for finding the equation of a straight line if we are given two points on the line.
It is quicker and easier than any other method I know and involves substituting ONCE, then some simplifying.
The formula is based on the fact that a straight line has a constant slope.
Call the two points
I will use B(1,2) as
Do not substitute for