F.4 math

eg:Draw the graph of y=x²-x-3 from x= -2 to x=3.

Step1:list the corresponding values of x and y in the given range.

Step:each pair of the corresponding values of x and y you list down gives the coordinates of a point.We use these coordinates to plot each point on the rectangular coordinate plane using the symbol ' X ' .After joining all the points with a smooth curve we get a graph of the equation