Interpreting and Using Linear Equations in Context

Question:
A phone plan charges a base rate plus a per-minute charge. The total monthly bill is modeled by the equation C equals 12 plus 0.08 times m, where C is the cost in dollars and m is the number of minutes used. Part a: Identify and interpret the y-intercept in context. Part b: Identify and interpret the slope in context. Part c: If the monthly bill is 28 dollars and 80 cents, how many minutes were used? Part d: Create a table showing costs for 0, 50, 100, 150, and 200 minutes, then verify your answer to part c using the table or graph.

Interpreting and Using Linear Equations in Context

This lesson explores a real-world linear equation in slope-intercept form by identifying and interpreting the slope and y-intercept in context. Students solve for an unknown input given an output value, build a table of values, and verify their answer using a graph.

In this lesson, you will learn