Mike's Car Wash is a pretty amazing place to get your car shiny and new. Maybe not such a good place for a person to go through a car wash though!
The problem, for you as the new owner is that there are multiple pricing schemes. And you don't know which one will give you the best return on the money you've invested. Your accountant hands you this analysis but has to rush out the door before she can explain what they mean. So you're stuck....
Is there anyway to know what it means and what parameters you should consider in picking the optimal price to charge your customers?
What do you think all these lines represent? Why would the accountant have done this kind of thing instead of writing it out in English?
This will be my setup tomorrow for our next problem set. In thinking about how to pull them into thinking about linear equations, this video will appeal to their middle school sense of humor and the Geogebra gives them a visual representation of the options.
I'll need to help them get oriented to the problem. Making sure that they know what's the problem really want you to do? what should you be looking to find? If the graph makes them stuck, I might offer the idea of using a different representation...can they generate a table from the graph's information or do they know enough to create equations? Are there any patterns that you can find on this diagram?
Anything so that they are steered in the direction of being able to solve the problem. Sure hope this gets them hooked and into developing their thinking and I hear great conversations tomorrow.