1. A line passes through the points $(1, 4)$ and $(5, 16)$. What is the slope of the line? The slope is ___.
2. A ski lift descends 10 meters for every 5 meters it travels horizontally. What is the slope of the path of the ski lift?
3. Calculate the slope of a line that passes through the points $(-2, 3)$ and $(4, 21)$. The slope is ___.
4. Which of the following best describes the slope of a line?
5. What is the slope of a line that passes through the points $(2, 7)$ and $(10, 11)$? Write your answer as a simplified fraction. The slope is ___.
6. A car travels 240 miles on 8 gallons of gasoline. What is the car's average fuel efficiency in miles per gallon? The answer is ___ miles per gallon.
7. A water tank's volume is measured at two different times. At 2 minutes, it holds 50 liters. At 7 minutes, it holds 80 liters. What is the average rate of change in liters per minute?
8. In a real-world context, the average rate of change between two points is simply another name for what mathematical concept?
9. In 2018, a town's population was 12,000. By 2023, the population had grown to 14,500. What was the average rate of change of the population in people per year? The answer is ___ people per year.
10. A subscription service's cost increased by 24 dollars over a period of 6 months. What was the average rate of change in cost per month?