Learning some basic definitions in the language of algebra will give you the framework you need. The terms in the two original questions are 5 and 2, and the operation is adding in the first expression and multiply¬ ing in the second. The 5 and 2 are specific numbers. But in algebra, the terms can be variables, a key word based on “to vary” or “to change.” If you change 5 + 2 = 7 (which you know is true) to x + 2 = 7, you’ve created an equation that may or may not be true, depending on the value of the variable x.

• The selected topic is the prediction of tires sales • The question that is focused is “Review the yearly data involving tires purchased at a ...