b) Point C shows where the point at x = 3 should be placed.
c) The roots of the equation are x = -1 or x = 3.
How to plot a quadratic function curve.
Point C shows where the point at x = 3 should be placed. Since x = 3 is one of the roots of the equation there must be an intercept at the point.
If the point is placed at either point B, D or E, the curve will cross the x axis at another point other than point C will the root is.
The solutions to the equation x² - 2x - 3 = 0 using the graph will be points where the curve intersect the x- axis. The values of x at that points given the roots or the solutions to the equation.
Observing careful, the curve crosses the x-axis at x = -1 and x = 3
so, the roots of the equation x² - 2x - 3 = 0 are x = -1 or x = 3.