Find a missing coordinate when the slope is given

Answer Key - Grade 9 Math Worksheet - Challenge Me

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

1. 1.

   The slope is -2/3. Ren's line has slope -2/3 and passes through (3, 4). Another point on the line is (9, y). What is y?

   0
2. 2.

   The slope is 3/4. Esme's line has slope 3/4 and passes through (1, -2). Another point on the line is (9, y). What is y?

   4
3. 3.

   The slope is -1/2. Noah's line has slope -1/2 and passes through (6, 1). Another point on the line is (-2, y). What is y?

   5
4. 4.

   The slope is 2. Luz's line has slope 2 and passes through (5, 8). Another point on the line is (1, y), to the left. What is y?

   0
5. 5.

   The slope is 3/2. Jun's line has slope 3/2 and passes through (6, 7). Another point on the line is (0, y), to the left. What is y?

   -2
6. 6.

   Each hour the output changes by -4. Pia's candle is 30 cm tall at hour 2 and burns down 4 cm each hour. At what hour is it 14 cm tall?

   6
7. 7.

   Each week the output changes by 3. Bo's plant is 12 cm tall in week 2 and grows 3 cm each week. In what week is it 27 cm tall?

   7
8. 8.

   Each hour the output changes by -150. Milo's water bottle holds 900 mL at hour 1 and loses 150 mL each hour. At what hour does it hold 300 mL?

   5
9. 9.

   The slope is 3/2. Zee's line has slope 3/2 and passes through (k, 2) and (7, 11). What is k?

   1
10. 10.

    The slope is 3. Ren's line has slope 3 and passes through (k, 2) and (9, 14). What is k?

    5