Find the slope from a table, a graph or two points

Answer Key - Grade 8 Math Worksheet - Challenge Me

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

1. Read this first

   Use the table

   input: days	output: snow depth in cm
   10	35
   18	23
   4	44
   16	26

2. 1.

   Pia's class tracks melting snow in the schoolyard on a few days. What is the slope (rate of change), in cm per day?

   -3/2
3. 2.

   In math club, Ren gets two points on a line: (1/2, 4) and (3, 9). What is the slope of the line?

   2
4. 3.

   In math club, Tala gets two points on a line: (-1.5, 2) and (1, -3). What is the slope of the line?

   -2
5. 4.

   In math club, Zee gets two points on a line: (2/3, 1) and (8/3, 7). What is the slope of the line?

   3
6. 5.

   Ari plots a line on a math-club grid. The two axes have different scales. What is the slope of the line?

   -2/5
7. 6.

   Bo plots a line on a math-club grid. The two axes have different scales. What is the slope of the line?

   -4
8. 7.

   Milo's line has slope 3 and goes through (2, 5). Another point on it has x = 6. What is its y?

   17
9. 8.

   Noah's line has slope -2 and goes through (-1, 4). Another point on it has x = 3. What is its y?

   -4
10. 9.

    Pia's line has slope 1/2 and goes through (4, -3). Another point on it has x = 12. What is its y?

    1
11. 10.

    Ren graphs a bike ride with km across and minutes up. The slope is 4. What does the slope tell?

    • Each 1 km takes 4 more minutes
    • Each 1 minute covers 4 more km
    • Each 1 km takes 4 fewer minutes
    • The ride is 4 km long