Use the graph to write an equation for the parabola,

The vertex form of na equation of a parabola:

(h, k) - vertex

We have a vertex in (0, 0). Therefore h = 0, k = 0.

The equation has form:

From the graph we have the point (3, 3).

Put the coordinates of the point to the equation:

        divide both sides by 9

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation: