Test 7 Section 4 #7

The scatterplot above shows the diameter x, in inches, and the age y, in years, of more than 40 trees in a certain park. Which of the following best describes the trend line of the scatterplot?

A) 2x+20

B) 5x+20

C) 10x+20

D) y=4x

E) y=12x

I got this one right, but it was really just a lucky guess. Scatterplots make no sense to me.

As I said in my last post, I’m busy working on the new edition of the Math Guide for the new SAT. Here’s another quick pair of graph questions for you to try out. You don’t need to be a site member to take this little quiz, but I’d encourage it. Site membership is free, (more…)