A student is attempting to solve the following problem using an Excel spreadsheet: A commuter working in Atlanta drives 80 miles round trip to work for 20 days each month. The commuter's car averages 32 miles per gallon (mpg). In addition to driving to work, the commuter drives an additional 300 miles each month for other purposes. Use the data to develop a simple spreadsheet model that calculates the total monthly gasoline usage. Here is the student's spreadsheet. A B 1 Data miles/day 80 3. days/month 20 4 additional miles/month 300 fuel economy (mpg) 32 Model Total miles/month 1900 Gallons consumed 59 What is an appropriate for formula for cell B7?

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.