Unit 2, Lesson 11
Writing Equations for Lines
Grade 8
Practice
Problem 1
Find the slope of each line.
Problem 2
Line \(\ell\) is shown in the coordinate plane.
- What are the coordinates of points \(C\) and \(D\)?
- Is the point \((16,20)\) on line \(\ell\)? Explain how you know.
- Is the point \((20,24)\) on line \(\ell\)? Explain how you know.
- Is the point \((80,100)\) on line \(\ell\)? Explain how you know.
- Write a rule that would allow you to test whether \((x,y)\) is on line \(\ell\).
Problem 3
Consider the graphed line.
Mai uses Triangle A and says the slope of this line is \(\frac{6}{4}\). Elena uses Triangle B and says the slope of this line is 1.5. Do you agree with either of them? Explain or show your reasoning.