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

Answer Key - Grade 8 Math Worksheet

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

1. Read this first

   Use the table

   input: days	output: height in cm
   9	11
   3	7
   12	13
   6	9

2. 1.

   Jun measures a young sunflower every 3 days. What is the slope (rate of change), in cm per day?

   2/3
3. 2.

   Kira reads the classroom thermometer every 2 hours. The heater keeps it cozy. What is the slope (rate of change), in °C per hour?

   0
4. 3.

   In math club, Luz gets two points on a line: (-2, -7) and (2, 5). What is the slope of the line?

   3
5. 4.

   In math club, Milo gets two points on a line: (1, 6) and (5, -6). What is the slope of the line?

   -3
6. 5.

   In math club, Noah gets two points on a line: (-4, 3) and (2, 0). What is the slope of the line?

   -1/2
7. 6.

   In math club, Pia gets two points on a line: (-5, -1) and (-1, 7). What is the slope of the line?

   2
8. 7.

   Zee graphs the temperature on a winter morning. The two axes have different scales. What is the slope (rate of change), in °C per hour?

   3/4
9. 8.

   On a steady bike ride, Bo has gone 4 km after 10 minutes and 13 km after 40 minutes. What is the rate of change, in km per minute?

   3/10
10. 9.

    Jun graphs a candle burning: hours across, height in cm up. The slope is -2. What does the slope tell?

    • The candle is 2 cm tall
    • The candle gets 1 cm shorter every 2 hours
    • The candle gets 2 cm shorter each hour
    • The candle gets 2 cm taller each hour
11. 10.

    Kira graphs a plant's height: weeks across, cm up. The slope is 3. What does the slope tell?

    • The plant grows 1 cm every 3 weeks
    • The plant grows 3 cm each week
    • The plant shrinks 3 cm each week
    • The plant is 3 cm tall