A line passes through the origin and the point (8, 4). The x-axis represents time in minutes, and the y-axis represents gallons. What rate does the slope represent? A. 12 gallons per minute B. 0,5 minutes per gallon C. 2 minutes per gallon D. 0,5 gallons per minute

You know two points on the line 0 minutes, 0 gallons) and (8 minutes, 4 gallons). The slope of the line is (4 gallons — 0 gallons)/(8 minutes — 0 minutes)=(4 gallons)/(8 minutes)=(4/8) (gallons / minutes)=1/2 gallons/minute.