Watch this video to learn about the equation of a straight line. Since we are given 2 points that already lie on the line, using the formula as before, we need to calculate the gradient first.

Predicting Values: Once you have a linear equation that represents a relationship, you can use it to predict values. For example, if you know the cost of producing a certain number of items, you can ...

The equation of a straight line can be worked out using coordinates and the gradient, and vice versa. Practice determining the equation of a straight line ahead of your National 5 Maths exam with this ...