In 1997 there were 14 large apartment buildings in Calston, TX. By 2010 there were 53 large apartment buildings. What is the rate of change in the number of apartments buildings from 1997 to 2010? A. 1/39 years per building B. 53/13 buildings per year C. 3 buildings per year D. 14 buildings per month
Rate of change is defined as the slope of two coordinate pairs. Given : (1997,14) and (2010, 53) Slope = 53-14/2010-1997 = 39 / 13 = 3 Hence, C. 3 buildings per year
