Answer:See explanationStep-by-step explanation:Linear:1. During the spring, the grass in Gianna's yard grew [tex]\frac{1}{2}[/tex] inch per week. Equation: [tex]y=\frac{1}{2}x,[/tex] where x is the number of spring weeks, y inches is the height of the grass after x weeks.2. Rita babysits. She worked 2 hours and earned $24. She worked 3 hours and earned $36.Equation: [tex]y=12x,[/tex] where x is the number of hours, y is the amount Rita earned in x hours.Exponential:1. The population of the town was 25,000 in 1980. Then the population increased by [tex]\frac{1}{2}\%[/tex] per year.Equation: [tex]y=25,000\cdot (1+0.005)^x,[/tex] where x is the number of years, y is the population after x years passed since 1980.2. A car was worth $18,500 when it was new. Then the value decreased 18% per year.Equation: [tex]y=18,500\cdot (1-0.18)^x,[/tex] where x is the number of years, y is the car price after x years passed.Neither linear nor exponential:Albert went on a hike. After 1 hour, he had hiked 4 miles; after 2 hours he had hiked 7 miles; after 3 hours he had hiked 11 miles.The differences 7 - 4 = 3, 11 - 7 = 4 are different, so the function is not linear. Also it is not exponential, becayse each next number of miles is not multiplied the previous number of miles by some number.