Describing Positive and Negative Slopes

The video tutorial explains how to describe positive and negative slopes using directed measurements. It begins by reviewing the concept of slope as the ratio of rise over run. The lesson introduces directed counting, emphasizing the importance of direction when measuring rise and run. By using examples, the tutorial demonstrates how to calculate slopes with directed counting, showing that the slope remains consistent despite changes in direction. The video concludes by highlighting the differences between positive and negative slopes and the importance of direction in slope calculations.

What is the basic formula for calculating the slope of a line?

• Run over rise

• Rise over run

• Sum of rise and run

• Difference between rise and run

In directed counting, what is the rise if you count from top to bottom?

• Undefined

• Negative

• Zero

• Positive

How does switching the points A and B affect the slope calculation?

• It changes the slope to negative

• It changes the rise and run but not the slope

• It makes the slope zero

• It doubles the slope

What is the slope of a line if the rise is -2 and the run is 4?

• 1/2

• -2

• -1/2

• 2

How does directed counting help in distinguishing between two lines?

• By identifying the direction of rise and run

• By altering the color of the lines

• By changing the length of the lines

• By making the lines parallel

What is the slope of a line with a rise of -2 and a run of 3?

• 2/3

• -2/3

• 3/2

• -3/2

When calculating slope, why is it important to consider the direction of rise and run?

• To ensure the slope is always positive

• To accurately determine the sign of the slope

• To make the calculation easier

• To avoid using decimals