What is the equation of the line passing through #(21,4)# and #(18,-2)#?
1 Answer
May 14, 2018
Explanation:
The equation of a straight line is
(the symbol for delta is wrong. It is actually a triangle. Delta means "change in".)
So in our case:
You can then substitute 2 into the equation:
You can then find out what c substituting one of the co-ordinates in.
If you take away 42 from both sides
So the answer is