Find and Use Slopes of Lines

Find the slope of the line.

Slopes of parallel lines are...

• opposite reciprocals.

• opposites.

• the same.

• always 7.

What type of slope is shown in the image?

• Positive

• Negative

• Undefined

• Zero

• parallel

• perpendicular

• neither

The slope of side AB is -3 and the slope of DC is -3. What does this mean?

• Side AB and AD are parallel

• Side AB and AD form a right angle

• Side AB and AD are congruent

• Nothing Specific

Julia proved ABCD is a parallelogram. She notices that side AB has a slope of 8/3 and BC has a slope of 1/3. What can she classify ABCD as?

• A rectangle

• A square

• A rhombus

• Just a parallelogram

What is this formula used for? \frac{y_2-y_1}{x_2-x_1}

• To find the distance between two points

• To find the slope between two points

• To find the midpoint between two points

You have plotted the parallelogram in the picture. Which sides would you want to find the slope of first?

• AB and BC

• AB and AD

• AD and DC

• AB and DC

You have plotted the parallelogram in the picture. What is the slope of line BC without having to use the slope formula?

• 0

• Undefined

Josie found the slope of AB to be

• She was correct.