An archive the questions from Mark's Spring 2019 Calculus I classes.

00: Pre-req Review #3 in MyOpenMath

audrey

In problem #3 of our classes problem set 00: Pre-req Review in MyOpenMath, I’m asked to find the domain and range of the function shown in the following graph:

I’ve got the domain correct but can’t get the range. My answer, as I typed it into MyOpenMath is:

[4, -5] = { x: 4 <= x <= -5}

I’m pretty sure that’s right but it’s marked incorrect. Any advice??

ktovarpe

Hello Audrey ,

For the range its negative to positive. Instead of [4,-5] try using [-5,4] but also with the range check the brackets (it could be a parentheses).

mark

Yes, this is a good point! In addition, I think she needs just the interval form [-5,4] and not the set builder form {x: 4<=x<=-5}. I do think the interval is closed on both endpoints.