In this lesson, students use slope, y-intercept, and linear equations to explore the costs of different-sized pizzas at Domino’s and debate whether the pizza chain should be more transparent in its pricing.
In this activity students look into a pattern and diagram where their first task is to verify the number of lines and squares.
Students will use the Google Earth path tool to connect markings in a geometric pattern of their design.
Try to collect as many diamonds as you can!
Can you decide whether two lines are perpendicular or not? Can you do this without drawing them?
On the grid provided, we can draw lines with different gradients. How many different gradients can you find? Can you arrange them in order of steepness?
Can you decide whether two lines are perpendicular or not? Can you do this without drawing them?Can you decide whether two lines are perpendicular or not? Can you do this without drawing them?
From what you’ve observed, what can we conclude about any two (non-vertical) lines drawn in the coordinate plane?
What does it mean for lines to be perpendicular (by definition)?
“Meet Slope” from IM Grade 8 by Open Up Resources and Illustrative Mathematics.
“Writing Equations for Lines” from IM Grade 8 by Open Up Resources and Illustrative Mathematics.
“Using Equations for Lines” from IM Grade 8 by Open Up Resources and Illustrative Mathematics.