Draw a line that fits the dots

Answer Key - Grade 8 Math Worksheet - Building Confidence

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

1. 1.

   Ren's class measured eight sunflowers and drew a ruler line through the dots. One sunflower leans toward the window. How many dots sit above the line?

   3
2. 2.

   Ari timed eight bike rides of different lengths. A ruler line is drawn through the dots, and one ride had a strong headwind. How many dots sit below the line?

   2
3. 3.

   Bo squeezed fresh lemons for the school fair's lemonade and plotted noon temperatures against cups poured. A ruler line goes through two dots. How should the line move to fit the dots better?

   • Move it down, so about as many dots sit above it as below it.
   • Leave it where it is, because it passes through two dots.
   • Move it up, so about as many dots sit above it as below it, raising the line.
4. 4.

   Esme's ruler line goes through two dots on the bean plants' plot. How should the line move to fit the dots better?

   • Move it down, so about as many dots sit above it as below it.
   • Leave it where it is, because it passes through two dots.
   • Move it up, so about as many dots sit above it as below it.
5. 5.

   At the walk-a-thon, Jun laid a ruler line through two dots. One walker wore a dinosaur costume. How should the line move to fit the dots better?

   • Move it up, so about as many dots sit above it as below it, lifting the line.
   • Move it down, so about as many dots sit above it as below it.
   • Leave it where it is, because it passes through two dots.
6. 6.

   Kira drew a ruler line through two of the kite dots. How should the line move to fit the dots better?

   • Leave it where it is, because it passes through two dots.
   • Move it down, so about as many dots sit above it as below it.
   • Move it up, so about as many dots sit above it as below it.
7. 7.

   Luz's music club plotted weekly piano practice against songs played without a mistake. Three ruler lines are drawn. Which line fits the dots best?

   • Line A, through (20, 10.5) and (90, 39.5)
   • Line B, through (20, 13) and (90, 41), joining the end dots
   • Line C, through (30, 13) and (40, 19)
8. 8.

   Milo measured eight seedlings on different days and drew three ruler lines on the plot. One seedling has a ladybug guest. Which line fits the dots best?

   • Line A, through (8, 26) and (10, 35)
   • Line B, through (6, 22.5) and (20, 65.5)
   • Line C, through (6, 26) and (20, 68)
9. 9.

   Noah's class went apple picking, and each picker filled a basket. They plotted minutes of picking against apples picked. Which of the three ruler lines fits the dots best?

   • Line B, through (20, 52) and (25, 59)
   • Line A, through (15, 36) and (50, 106)
   • Line C, through (15, 38.5) and (50, 109.5)
10. 10.

    Pia folded eight paper planes with different wing widths and plotted how far each flew. Which of the three ruler lines fits the dots best?

    • Line B, through (12, 8) and (16, 11)
    • Line A, through (8, 5.5) and (22, 12.5)
    • Line C, through (8, 4) and (22, 11)