Grade 8 | Unit 3 | Lesson 9: Slopes Don't Have to be Positive | Practice Problems

• Positive

• Negative

• Zero

Suppose the plane is descending at a rate of 1000 feet per minute. Decide if the slope is positive, zero, or negative.

• Positive

• Negative

• Zero

Suppose the plane is ascending at a rate of 2000 feet per minute. Decide if the slope is positive, zero, or negative.

• Positive

• Negative

• Zero

After how many hours of hiking will they be 16 miles from their car? Explain or show your reasoning.

Elena's aunt pays her $1 for each call she makes to let people know about her aunt's new business. The table shows how much money Diego receives for washing windows for his neighbors. Select all the statements about the situation that are true.

• B: Diego makes more money for washing each window than Elena makes for making each call.

• C: Elena makes the same amount of money for 20 calls as Diego makes for 18 windows.

• D: Diego needs to wash 35 windows to make as much money as Elena makes for 40 calls.

• A: Elena makes more money for making 10 calls than Diego makes for washing 10 windows.

Each square on a grid represents 1 unit on each side. Match the graphs with the slopes of the lines.