I returned your quiz from yesterday and then handed out a bunch of questions from a past EQAO exam (2011, I think). The questions deal with linear relations, and many of them are applications. We worked on them for most of the period today.
You should be working on these questions for at least another 20 minutes outside of class if you’re not already done.
Three terms came up today that we haven’t really talked about yet:
Initial value of a linear relation: Usually, this is the value of the dependent variable when the independent variable is zero. It’s only really meaningful in the context of a problem. It’s like the y-intercept.
Direct variation: a linear relation that has a non-zero slope and goes through the origin shows direct variation. Equations look like this: (that is, the y-intercept is 0).
Partial variation: a linear relation that has a non-zero slope and does not go through the origin shows partial variation. Equations look like this: (that is, the y-intercept is not 0).