Write and Evaluate a Variable Expression for Total Cost (ax+b)

It's just the cost of the game. Using a two-part example, the presenter writes an expression to determine the amount friends spend to attend a game. The video shows the total amount they spend when given the cost of each ticket.

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CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Lead a discussion on why it may be beneficial to write an algebraic expression instead of performing the arithmetic
  • Develop another cost scenario and have classmates calculate the cost based on different prices
Classroom Considerations
  • Assumes students are familiar with substitution to evaluate an expression
  • Includes a link to several other examples
  • Shows the arithmetic steps to arrive at the solution
  • None
Common Core