Lesson 11: Writing Equations for Lines | Unit 2: Dilations, Similarity, and Introducing Slope

Multiple Choice

What is the slope of the line in image A?

• 0
• 1
• -1
• 2

Multiple Choice

What is the slope of the line in image B?

• 1
• 2
• -1
• 0

Multiple Choice

What is the slope of the line in image C?

• 2
• 1
• 0
• -1

Multiple Choice

What is the slope of the line in image D?

• 1
• 2
• -1
• 0

Multiple Choice

What are the coordinates of points $$C$$ and $$D$$ ?

• C: (4, 5), D: (6, 7)
• C: (7, 8), D: (9, 10)
• C: (1, 1), D: (3, 4)
• C: (2, 3), D: (5, 6)

Open Ended

Is the point $$(16,20)$$ on line $$\ell$$ ? Explain how you know.

Open Ended

Is the point $$(20,24)$$ on line $$\ell$$ ? Explain how you know.

Open Ended

Is the point $$(80,100)$$ on line $$\ell$$ ? Explain how you know.

Multiple Choice

Which rule would allow you to test whether $$(x,y)$$ is on line $$\ell$$ ?

• Substitute (x,y) into the line's equation.
• Calculate the distance from the point to the line.
• Find the midpoint of the line segment.
• Check the slope of the line.

Open Ended

Consider the graphed line. Mai uses Triangle A and says the slope of this line is $$\frac{6}{4}$$ . Do you agree with Mai? Explain your reasoning.