Let's say that I have a linear equation, for example:
y = 0.25x - 4
Now, at what value of 'x' should I start and end? Do I only need to do 2 points and just draw a long straight line throught both points (I'm aware that if this is the case, it wouldn't work for quadratic graphs)??
It's the same with Quadratic graphs, how to work out from an equation at what values of 'x' I need to start and end with?