Question 2327
Get any straight line equation in the form y=mx+c...m is the gradient and c is the y-intercept. Any straight line will cross the x-axis once ONLY (unless the line is parallel to the x-axis, then no crossing).

The x-value at which the line crosses the x-axis is called the SOLUTION or ROOT of the equation. So, there will NOT be 3 solutions!!!

solution...

2y = 4x + 4
so, y = 2x + 2

gradient is +2
y-intercept is at y=2

when y=0, x=-1 --> this is the root (or solution)

so draw your axes, plot these two points and draw a straight line between them. Done!

{{{graph(200,200,-3,3,-3,3,2x + 2)}}}

Jon