Reflections
What happens to the sign of the x-coordinate when reflecting across the y-axis?
it changes signs
Which quadrant is (5, 3) in?
Quadrant I
Which number is farther right: -2 or 3?
3
What is the opposite of 6?
-6
If sea level is 0, what does -20 feet represent?
20 feet below sea level
Which symbol means “greater than”?
>
What is |5|?
5
Find the distance between (2, 3) and (2, 8).
5
What happens to the sign of the y-coordinate when reflecting across the x-axis?
it changes signs
Which quadrant is (9, -1) in?
Quadrant IV
What number is 5 units to the left of 2?
-3
What is the opposite of -9?
9
If a diver is at -15 feet and rises 10 feet, where is she now?
-5 feet
Solve: x > -3. Name one solution.
(Any number greater than -3)
What is |-8|?
8
Find the distance between (1, -4) and (6, -4).
5
Reflect (4, −3) across the y-axis.
(-4, -3)
Which quadrant is (-2, -8) in?
Quadrant III
What number is 4 units to the right of -6?
-2
What is the opposite of the opposite of 4?
4
A mountain is 2,000 feet above sea level. How is that written as an integer?
+2000
Is -5 < -2 true or false?
True
What does absolute value represent?
Distance from zero
Are (3, 2) and (3, -6) vertically or horizontally aligned?
Vertically
Reflect (-2, 5) across the x-axis.
(-2, -5)
Which quadrant is (-4, 6) in?
Quadrant II
Which is greater: -7 or -4?
-4
What is the opposite of the opposite of -12?
-12
A submarine is at -120 feet and descends 30 more feet. What is the new elevation?
-150
Solve: x ≤ 4. Is 4 a solution?
Yes
Solve: |x| = 6
x = 6 or x = -6
Find the distance between (-2, 1) and (4, 1).
6
Reflect (3, -7) across both axes.
(-3, 7)
What quadrant is the point (0, 7) in?
None — it is on the y-axis.
What is the distance between -8 and 5 on a number line?
13
Explain what happens when you take the opposite twice.
You get the original number.
What is the distance between -40 feet and +60 feet?
100 feet
Write an inequality for: “A number is less than 7.”
x < 7
What is | -12 + 5 | ?
7
Two points are located at (-3, 4) and (-3, -8).
What is the distance between the two points?
12 units