Linera Equations

Linear equations are those equations that describe a straight line. That is, one amount is directly proportional to another, plus a constant.

Linear Equation: y = mx + b

The secret to life, the universe and linear equations is the formula:

Note: x and y are variables while b and m are constants. The constants are placeholders until you can fill in the value from an actual problem. They are not variables, and once you’re given a value they cannot change.

We call m the slope, because it tells you how much y increases for each change in x. It is equal to the “rise divided by the run” on its graph.

We call b the y- intercept, because it tells you the value of y when x = 0.