You're trying to solve:
So rewrite this as:
Divide by x to get
So plot the line 9-2x on your graph and see where it intersects the 4/x curve.
I'm trying to help a younger relative with some maths but I'm stumped on a question. Can anyone help?
Part of the graph y=4/x is shown on the opposite grid. Draw a straight line on
the grid which will enable you to solve the equation 2x² - 9x + 4 = 0