Question

15 points I need help plz ASAP

Answer 1

Answer:

See explanation

Step-by-step explanation:

Linear:

1. During the spring, the grass in Gianna's yard grew $\frac{1}{2}$ inch per week.

Equation: $y=\frac{1}{2}x,$ 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: $y=12x,$ 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 $\frac{1}{2}\%$ per year.

Equation: $y=25,000\cdot (1+0.005)^x,$ 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: $y=18,500\cdot (1-0.18)^x,$ 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.