While there are more than two variables in this equation, it's still a linear equation because one of the variables will always be a constant (distance). Example 2 ...

For example, 0c + 1r + 2g = 10 turns into r = 10 – 2g. Substitute that value for r in the other two equations and continue like this until you’ve defined all variables in terms of just one variable, ...

When the relationship between cost and certain variables is linear, accountants develop an equation for calculating future costs based on the value of the associated variables. For example, if ...