Section 3.4 Rates

From your text:

Most of the time when we talk about rates, we use the concept of “unit rates.” Examples:

How much for 1 gallon of gas $/gal How many miles run in 1 hour mi/hr How much tuition you pay per credit (per means “for each one”) $/credit

It doesn’t always have to be that way, but it usually is.Property taxes are generally paid so much for every $1000 your home is worth.The slope of a roof is usually given by how many inches the rise is for every 12 inches of

run (think about it…12 inches is 1 foot).

Note: Rates are generally “reduced.” To give a rate as 6miles/8hours is NOT going to be acceptable. You need to take it down to a decimal or whole number (e.g. 0.75mph).

Terminology

From your text:

Next, let’s plot points and then connect to graph a line. What is the minimum number of points we need to plot? How many WILL we plot?

Which points would you pick? What’s your approach?

#1)

#2)

#3)

Homework: MLP (MyLabsPlus) and the following problems from the text.1-6 Give the answer only, fully simplified with correct units.12 Make sure you show work to justify your answer. Answer in a complete

sentence with the proper units. 20 Follow the directions in the text. Use graph paper.35,38 Give the answer fully simplified with units in a sentence. Justify your

answer with work.39-44 Give the answer only and explain in words how you got your answer.

MLP problems & Quiz due _________ Text problems due __________