Martin, an accountant, observes that his company purchased refrigerators at a cost of $300 and is currently selling them at a price of $849. What is the mark-up percentage?
Answer: A linear equation in the form y = mx + c has slope m Any line parallel to 3x + 9y = 5 has the same slope 3x + 9y = 5 → 9y = -3x + 5 → y = (-3/9)x + 5/9 → y = -⅓x + 5/9 &
