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Grade 9 · Math · Algebra 1

9th grade Graph absolute value, square root and cube root functions worksheet

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Graph absolute value, square root and cube root functions

Grade 9 Math Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

  1. Luz turns y = |x| into y = 3|x + 2| − 4 for a castle tower top. Where does the point (-1, 1) of y = |x| go? Write it like (7, -3).

  2. Milo turns y = |x| into y = −|x + 3| + 5 for a cloud dip. Where does the point (3, 3) of y = |x| go? Write it like (7, -3).

  3. Noah turns y = |x| into y = −3|x − 2| − 2 for a rocket dive. Where does the point (1, 1) of y = |x| go? Write it like (7, -3).

  4. Pia draws a V for a kite-string pattern. The vertex is (-1, -3) and the V passes through (1, 1). Which equation fits?

    • y = 4|x + 1| − 3
    • y = 2|x + 1| − 3
    • y = 2|x − 1| − 3
    • y = |x + 1| − 3
  5. Ren draws a V for a tent outline. The vertex is (2, 5) and the V passes through (4, 1). Which equation fits?

    • y = −4|x − 2| + 5
    • y = 2|x − 2| + 5
    • y = −2|x − 2| + 5
    • y = −2|x + 2| + 5
  6. Zee draws a V for an umbrella's folded edge. The vertex is (-4, 6) and the V passes through (-2, -2). Which equation fits?

    • y = −8|x + 4| + 6
    • y = 4|x + 4| + 6
    • y = −4|x + 4| + 6
    • y = −4|x − 4| + 6
  7. Ari graphs y = −√(x − 2) + 4 for a marble track. What is the range?

    • All real numbers
    • y ≤ 4
    • y ≤ 2
    • y ≥ 4
  8. Bo graphs y = −√(x + 5) − 1 for a sled run. What is the range?

    Use the picture in question 7.

    • y ≤ -1
    • All real numbers
    • y ≤ -5
    • y ≥ -1
  9. Esme graphs y = ∛(x − 3) + 2 for a swing's path in a game. What is the domain?

    • x ≤ 3
    • x ≥ 3, just like a square root graph
    • All real numbers
  10. Jun graphs y = ∛(x + 6) − 1 for a wave in a boat game. What is the range?

    Use the picture in question 9.

    • y ≥ -1
    • y ≤ -1
    • All real numbers
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9th grade Graph absolute value, square root and cube root functions worksheet – printable
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About this worksheet

Graph absolute value, square root and cube root functions. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can find the vertex of y = |x − 3| + 2 and the start point of y = √(x + 1) − 4 from the equation.
  • I can give the domain and range, and the slope of each side of a V.
  • I can move a point of y = |x| through a flip, a stretch and a shift, and pick the equation of a V from its graph.

Standard: F-IF.C.7b, F-BF.B.3, F-IF.B.5

Words to know

vertex: The tip of a V, where the graph turns.

start point: Where a square root graph begins; nothing is drawn to its left.

domain: Every input (x-value) the graph uses.

range: Every output (y-value) the graph reaches.

stretch: Multiplying every output by the same number; the V gets steeper.

Common mistakes

Your child moved the graph the wrong way left or right. In y = |x − 3| the graph moves right 3, because x = 3 makes the inside 0.

Your child swapped the left-right move and the up-down move.

Your child said every number works, but this graph has a lowest point or a starting point.

What to say

Ask: which x-value makes the inside 0?

Ask: which number is inside the bars or the root (it moves left or right), and which is outside (it moves up or down)?

Ask: is there a value the graph never goes past?

Questions parents ask

What is the most common mistake with graph absolute value, square root and cube root functions?

Your child moved the graph the wrong way left or right. In y = |x − 3| the graph moves right 3, because x = 3 makes the inside 0.

How can I help my child with graph absolute value, square root and cube root functions?

Ask: which x-value makes the inside 0?

Are these 9th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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