Im stuck on this qustion:

Draw a suitablestraightline on the grid (a grid is provided) to find estimates of the solutions of the equation...

x^2 - 3x - 6 = 0

(^ means "to the power of", So... x(to the power of 2) - 3x - 6 =0 )

Thanx to anyone who can help me out. i have no idear what to do