The equation is useful when we know. Remember to include the right sign of the slope. So if you encounter an equation in standard form that you are required to graph you must convert it to slope intercept form.
Okay theyve given me the value of the slope.
Have a play with it first move the point try different slopes. Now lets discover more. Substitute the known values into the slope formula and simplify if necessary. You can use this equation to write an equation if you know the slope and the y-intercept.