Grade of a Road.

Driving East on I-70 into Denver, there's signs posted about the road being a "6% grade."  What's that mean?  Why is this posted on the highway?   A 9% grade is steeper.  Rock climbers think nothing of a 100% grade; many even climb an infinite grade.  mmm.  What's that mean? We've explored this briefly in class, in particular in regard to the Pike's Peak Cog Railway that sports a 25% grade in one section.

Do a short quick google search on "Grade of Road" or "Incline."

I've never seen or driven on an 18% grade or a 25% grade on a road; the 9% grade I drove on was steep enough.  What grades have you seen? I think there's a 12% grade into Jackson Hole, Wyoming.  Anyone drive on that grade?








Your blog: How is the grade of a road established? What's it mean to have an x% grade?  Explain.  Is this helpful information?

The grade of a road has EVERYTHING to do with the slope of a line.  What is the slope of a line?  How is this related?

Here's an image to help in your description:

In your blog, to earn full credit, you will need the following: (a) to connect trigonometry, slope, and grade together; (b) to include an application -- maybe something you saw on a road or read about.  You  may NOT write about the Manitou (Pike's Peak) Incline (that was already done in class); (c) to write complete ideas in full sentences. Your blog needs to stand alone -- that is, not require your reader to also read my blog. 

Images are great, but this is a blog with an implication that there's an essay there.  If you have any questions, please ask!