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Grade 9 · Math · Algebra 1

9th grade Write an exponential function from a table, graph or story worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

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Write an exponential function from a table, graph or story

Grade 9 Math Worksheet - Building Confidence

NameDate

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

  1. Read this first

    Growth table

    xy
    06
    124
    296
    3384
  2. Pia's class counts seedlings in a big tray. Every arrow in the growth table multiplies by the same factor. What is the factor?

  3. Ren's star-sticker pattern grows each round. Every arrow in the growth table multiplies by the same factor. What is the factor?

  4. Tala's puzzle game gives points for each level. Every arrow in the growth table multiplies by the same factor. What is the factor?

  5. 1 | 15; 2 | 45; 3 | 135; 4 | 405. Every arrow down the table: × 3. Ari's robot game table starts at x = 1. Every arrow is × 3. What is the starting amount, the value at x = 0?

  6. 1 | 21; 2 | 63; 3 | 189; 4 | 567. Every arrow down the table: × 3. Bo's seed-tray game table starts at x = 1. Every arrow is × 3. What is the starting amount, the value at x = 0?

  7. 1 | 36; 2 | 144; 3 | 576; 4 | 2304. Every arrow down the table: × 4. Jun's drum-beat table starts at x = 1. Every arrow is × 4. What is the starting amount, the value at x = 0?

  8. 0 | 4; 1 | 24; 2 | 144; 3 | 864. Every arrow down the table: × 6. Kira's bee-pattern drawing starts at 4 (row x = 0), and every arrow is × 6. What function fits the table? Start with y =.

  9. 0 | 5; 1 | 10; 2 | 20; 3 | 40. Every arrow down the table: × 2. Luz's pencil-pattern table starts at 5 (row x = 0), and every arrow is × 2. What function fits the table? Start with y =.

  10. 0 | 2; 1 | 14; 2 | 98; 3 | 686. Every arrow down the table: × 7. Milo's leaf-pattern table starts at 2 (row x = 0), and every arrow is × 7. What function fits the table? Start with y =.

  11. 0 | 8; 1 | 40; 2 | 200; 3 | 1000. Every arrow down the table: × 5. Noah's tree-branch table starts at 8 (row x = 0), and every arrow is × 5. What function fits the table? Start with y =.

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9th grade Write an exponential function from a table, graph or story worksheet – printable
Print: 123456

About this worksheet

Write exponential functions. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can find the start and the growth factor from a table, a graph or a story.
  • I can write the function as y = a(b)^x.
  • I can do it when the table starts at x = 1 or skips inputs, or from two points.

Standard: F-LE.A.2, F-BF.A.1a

Words to know

starting amount: The value at x = 0; the a in y = a(b)^x.

growth factor: What every step multiplies by: next value ÷ this value.

ratio of neighbors: One value divided by the value just before it.

exponential function: y = a(b)^x: start at a and multiply by b each step.

Common mistakes

Your child found the difference between rows in a table that multiplies.

Your child divided the earlier value by the later one, so the factor came out upside down.

Your child used the first value shown as the starting amount, but it was not at x = 0.

What to say

Ask: what do you multiply one row by to get the next?

Ask: what do you multiply the first value by to get the next one?

Ask: what is the value one step before the first row?

Questions parents ask

What is the most common mistake with write an exponential function from a table, graph or story?

Your child found the difference between rows in a table that multiplies.

How can I help my child with write an exponential function from a table, graph or story?

Ask: what do you multiply one row by to get the next?

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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