# Intermediate Algebra Assignment for 5/17

Today’s assignment is about deciding whether a linear or exponential model is most appropriate for a set of data. The short version is make a scatterplot and examine the picture. If it looks straight, use a linear model. If it looks curved, use an exponential one.

# Intermediate Algebra Assignment for 5/14

More with linear and exponential models today, specifically with interpreting what the parameters (slope, y-intercept, growth rate) mean in the context of the scenario they model.

The big takeaway is this: for both linear and exponential models, the y-intercept is the starting point or initial value. For a linear function, the slope is the unit rate of change – the change in whatever y measures per one unit increase of whatever x measures. For an exponential function, the value of b always represents the growth or decay rate – typically expressed as a percent. You’ll need to set b = 1 + r or b = 1 – r, then solve for r to get the percent change.

Don’t forget to bring your Chromebook and calculator every day for the rest of this week!

# Intermediate Algebra Assignment for 5/13

We’re in the last phase of Unit 9, which starts off by reviewing the difference between linear and exponential equations and deriving the formulas for these equations from a table of values.

# Intermediate Algebra Assignment for 5/6

A special case of exponential functions today: Compound Interest

# Intermediate Algebra Assignment for 5/2

Continuing with the unit on exponential functions, today we spent some time working on creating functions that model real-world data.

# Intermediate Algebra Assignment for 4/26

We will have a quiz on the first part of the unit (including simplifying expressions with exponents and on sketching the graphs of exponential functions) on Tuesday, April 30. We started reviewing for this quiz with a game of survivor.

# Intermediate Algebra Assignment for 4/25

Today, we revisited the exponential growth and decay functions we first saw with the M&Ms activity on Wednesday, and we formalized our notation and vocabulary a bit.

If you’re here to watch a lesson video in class, you can find it here.

• Homework: HW 9.3 – Exponential Growth and Decay
• Notes
• Lesson video – This video refers to a specialized version of the exponential function formula we discussed on the notes, where there is a specific % increase or decrease, but the overall content is the same. You can also stop watching at around the 7-minute mark, as it goes on to examples we will not do.

# Intermediate Algebra Assignment for 4/24

Today, we reviewed the various shortcuts for simplifying expressions with exponents, and tonight is some practice of them.