6a.) From the early 1970's through 2001, the rate of obesity in young American children, ages 6 to 11, has shown a linear increase. In 1988, approximately 11.3% of 6-11 year old American children were obsese. By 2001, the rate of obese Americans had risen to 16%. Write a linear model that would model these data where t = time in years after 1988 and R is the rate of obesity as a percentage. Show all your steps. 6b.) Use this model to predict the 2016 obesity rate among 6 - 11 year od American children. Show all your steps