Section A Section A Checkpoint

Problem 1

Plot and label each of the points on the number line.

  1. -6.5
  2. The opposite of -8
  3. All numbers whose absolute value equals 2
Show Solution
Solution

Problem 2

Use <, >, or = to compare each pair of values.

  1. 12 ‾ -3012\text{ }\underline{\hspace{.5in}}\text{ }\text-30

  2. ∣12∣ ‾ ∣-30∣|12|\text{ }\underline{\hspace{.5in}}\text{ }|\text-30|

  3. -11 ‾ -22\text-11\text{ }\underline{\hspace{.5in}}\text{ }\text-22

  4. ∣-8∣ ‾ ∣8∣|\text-8|\text{ }\underline{\hspace{.5in}}\text{ }|8|
Show Solution
Solution
  1. >
  2. <
  3. >
  4. =

Problem 3

Tyler is visiting a city that has some locations below sea level. Here are his elevations at different times of the day:

  • Morning: 7 feet below sea level
  • Lunch: 11 feet above sea level
  • Afternoon: -4 feet
  1. At what time of day was Tyler the lowest in elevation?
  2. At what time of day was Tyler farthest from sea level?
  3. What would an elevation of 0 represent in this situation?
Show Solution
Solution
  1. Morning
  2. Lunch
  3. Sea level