because we have been given the values of x we replace them by the values given hence we can say y=-2²+2 which is -2 for the first box in ad then 0in the second and 6 in the third
you come and look in the graph which suits the equation by using the table you completed like -1on the x axis and 1 on the y axis goes for both Curve A and B then 2 on the x axis and 6 on the y axis goes for curveC
