The distance a person walks, \(d\), in kilometers, is a function of time, \(t\), in minutes, since the walk begins.

Select all true statements about the input variable of this function.

It costs \$3 per hour to park in a parking lot, and there is a maximum cost of \$12.

Explain why the amount of time a car is parked might not be a function of the parking cost.

Here are clues for a puzzle involving two numbers.

• Seven times the first number plus six times the second number equals 31.
• Three times the first number minus ten times the second number is 29.

What are the two numbers? Explain or show your reasoning.

To keep some privacy about the students, a professor releases only summary statistics about student scores on a difficult quiz.

Based on this information, what can you know about outliers in the student scores?

An airline company creates a scatter plot showing the relationship between the number of flights an airport offers and the average distance, in miles, travelers must drive to reach the airport. The correlation coefficient of the line of best fit is -0.52.

1. Are the number of flights offered and average distance driven to the airport correlated? Explain your reasoning.
2. Do either of the variables cause the other to change? Explain your reasoning.

Select all lines that are perpendicular to \(y-4 = \text-\frac{2}3 (x+1)\).