Question

keith is saving money for a car. he has saved the same amount each year for the past three years, and records how much he has at the end of each year in the table below. year 1 year 2 year 3 total amount saved $1500 $3000 $4500 what is keiths unit rate of change of dollars with respect to time; that is, how much does keith save in one year? the unit rate is \boxed{} dollars per year. graph the proportional relationship described above, with the x-coordinate representing years, and the y-coordinate representing amount saved in thousands of dollars.

Explanation:

Step1: Find the change in amount

Subtract the amount in Year 1 from Year 2: $3000 - 1500 = 1500$

Step2: Find the change in time

Subtract Year 1 from Year 2: $2 - 1 = 1$

Step3: Calculate unit rate

Unit rate = $\frac{\text{Change in amount}}{\text{Change in time}} = \frac{1500}{1} = 1500$

Answer:

1500