You are researching the growth of a species of fish. You gather a sample of fish and record the age in weeks of each fish and its mass in grams. The data is displayed on the grid below with the blue points. Age of fish (weeks) 4 Mass of fish (g) 8 12 16 100 150 550 550 550 1100 750 20 32 36 40 1050 24.69x+81.6 You construct a linear model for the data, and your equation is y = 24.69x + 81.6 where y is the mass in grams of the fish and x is the age in weeks. a) Use the equation to identify the slope of the linear model. Use the units for y and x (along with the concept of rise over run) to interpret the slope in this context. b) Use the equation to identify the y-intercept of the linear model. Use the units for y (along with the concept that x = 0 at the y-intercept) to interpret the y-intercept in this context.