What the gradient (m) and y-intercept (c) of a rule are:

• By calculating them from a table,

• By identifying them in a graph, and

• By finding them in the rule.

The general equation of a straight line: y = mx + c.

How to convert between tables, equations and graphs.

How to calculate gradients that are fractions.

Calculate the y-intercept using a point on a line and its gradient.

Calculate y = mx + c using just two points on the line.

How Desmos can find the "best" line for any set of points.