The Blue Ridge Trail starts at Park Headquarters in Big Bear Park and goes up the mountain. The Green Creek Trail starts at Park Headquarters and goes down the mountain. The table gives elevations of various points of interest in relation to Park Headquarters. How many points of interest are less than 1 kilometer above or below Park Headquarters?

a. How can you find how far above or below Park Headquarters a given point of interest is located?

b. How can you find the number of points of interest that are less than 1 km above or below Park Headquarters?

c. Find how far above or below Park Headquarters each point of interest is located.

d. How many points of interest are less than 1 kilometer above or below Park Headquarters?

Use Reasoning Name a rational number that can replace ? to make both statements true.

\(\text{?} \gt ^{-}3 \)          \(|\text{?}| \lt |^{-}3|\)

Laila said |4| equals |−4|. Is Laila correct? Use the number line and words to support your answer.