Videos, examples, solutions, and lessons to help Grade 8 students learn how to describe qualitatively the functional relationship between two quantities by analyzing a graph (e.g., where the function is increasing or decreasing, linear or nonlinear). Sketch a graph that exhibits the qualitative features of a function that has been described verbally.
Common Core: 8.F.5
2. Each point on the graph represents a bag of popping corn. Explain the answers to the questions below.
a) Which bag is the most expensive? What does it cost?
b) Which bag has the least mass? What is this mass?
c) What bags have the same mass? What is this mass?
d) Which bags cost the same? What is this cost?
e) Which of bags C or D has the better value for the money?
Interpreting and Sketching Graphs (Part 2)
Examples:
1. Describe the journey for each segment of the graph.
2. This graph represents a day trip from Athabasca to Kikino in Alberta, a distance of approximately 140 km. Describe the journey for each segment of the graph.