vertex, factored, and standard from (using previous work)
expanding and factoring
Board questions:
Expand:
a) (3x+1)(x+2)
b) 3(x+2)(x-1)
What method did you use and why?
Factor:
a) x²+5x-6
What are the steps?
b) -4x²+24x+108
What are the steps?
There are several exam review questions to help you prepare for your exam. You should also use this time to work on your portfolio. Recall that the exam reviews might be a part of your portfolio.
Today you have your open-book test on probability and data management. You may use the entire period to complete this test. Once you are finished, hand in to the class bin.
If you finish early, continue to work on your course summative portfolio.
Learning Goal I am learning to calculate mean, median, mode determine when each measure of central tendency is appropriate
We will begin by discussing preparing for an open-book test. How will you prepare for your test tomorrow?
Next, we will look at a problem:
Two car salesmen are competing for a mid-year bonus. The owner of the dealership wants to assess the better competitor. Who is the better candidate?
It all depends on how you crunch the numbers!
We are going to review different ways to interpret data sets using measures of central tendency: mean, median, mode by calculating and using technology.
How do you decide when each measure is appropriate?
Learning Goal I am learning to determine information about a population by looking at a sample identify and describe different sampling techniques critically analyze sampling techniques to determine if bias is present or if results are reliable
A sampling problem:
Nathalie Beauchamp surveys randomly from her on-line youth book club members as well as the lists of youth cardholders at the two nearest community libraries.
She returns to school and suggests to her friend on students’ council that the school should host a read-a-thon to raise money for prom since the participants in her survey all felt that it was a good idea.
What is the problem with her research?
What is the population she is actually studying?
We will examine some different sampling techniques today and discuss the pros and cons with each.
Then to sum up, we will play a game: NAME THAT SAMPLING TECHNIQUE
Finally, practice you knowledge of sampling techniques.
Learning Goal I am learning to determine information about a population by looking at a sample identify and describe different sampling techniques critically analyze sampling techniques to determine if bias is present or if results are reliable
First, you will be introduced to your first of two summatives for the course:
Next we will investigate animal populations… Have you ever read something like “there are 800 mountain gorillas remaining in the wild,” and wondered, “How do they know how many there are?!” How can biologists know this?
We will look at the mark and re-capture technique today: biologists catches some animals, tags them (without harming them), and then lets them go. Later, another sample is caught. The ratio of marked animals to all the animals in the second sample should be approximately the same as in the population.
#marked in 2nd sample = #marked in population
total # in 2nd sample total population
Let’s define some of these terms:
population
sample
census
bias
You will simulate this experiment with moose. See PG 309 in your text. Work with a partner and get a population of moose. Don’t worry, they are only paper! You will follow the instructions to determine your population.
Complete the questions on PG 309 and the reflect questions and hand into the bin.