A linear equation is drawn as a straight line on a set of axes. To draw the graph we need coordinates. We generate these coordinates by substituting values into the linear equation.

What linear equation would fit this data the best? This is linear regression. Let me do two things. First, show you how to do linear regression in google docs (trendline).

The time-tested technique for predicting numbers, and the role of domain knowledge in machine learning.

Revise how to plot a linear equation graph. Learn how to read x and y coordinates from a graph in this BBC Bitesize maths KS3 guide.