Graph a line from y = mx + b, and make a table of values

Answer Key - Grade 8 Math Worksheet - Challenge Me

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

1. 1.

   Kira fills a table of values for y = 2x ÷ 3 + 4. What is y when x = 9?

   10
2. 2.

   Milo fills a table of values for y = 1.5x − 2. What is y when x = 6?

   7
3. 3.

   Pia graphs y = -3x ÷ 4 + 5, starting where the line meets the y-axis. Which is the next point to the right with whole-number coordinates?

   (4, 2)
4. 4.

   Ren graphs y = 5x ÷ 2 − 4, starting where the line meets the y-axis. Which is the next point to the right with whole-number coordinates?

   (2, 1)
5. 5.

   Tala checks points for the line y = 3x ÷ 5 − 1. Which point is on the line?

   • (10, 6)
   • (5, 10)
   • (10, 5)
   • (10, 29)
6. 6.

   Ari checks points for the line y = -x ÷ 2 + 3. Which point is on the line?

   • (8, -4)
   • (-1, 8)
   • (8, -1)
   • (8, 7)
7. 7.

   Bo's line crosses the y-axis at -2 and rises 3 for every 4 across. What is y on the line at x = 12?

   7
8. 8.

   Jun's line goes through (0, 3) and (2, 8). What is y on the line at x = 6?

   18
9. 9.

   Kira plots (0, 2), (1, 5) and (2, 9) for y = 3x + 2. One point is wrong. Which one, and what should it be?

   • (0, 2): the line should start at (0, 3)
   • None: all three points are right
   • (2, 9): it should be (2, 8)
   • (1, 5): it should be (5, 1)
10. 10.

    Milo plots (0, 1), (2, 2) and (4, 4) for y = x ÷ 2 + 1. One point is wrong. Which one, and what should it be?

    • (4, 4): it should be (4, 3)
    • None: all three points are right
    • (2, 2): it should be (2, 3)
    • (2, 2): it should be (2, 5)