Detective Sherlock Holmes was known for his great skills in searching for clues and joining the dots together to solve the mystery. A linear graph is exacltly that, plotting the points, and then joining the dots together to create a straight line. What would Sherlock Holmes do to figure out what a linear graph was, and how would he’d recognise if the graph was linear without actually drawing it?
A linear graph is simply a straight graph. To tell if an equation is linear by just looking at it, the feature you look at is that the “X” is not raised to an exponent higher than 1, so you will get the an equation in a form of y= mx + c