At x = -2, both y values are 8 and at x = 1 both y values are -2.
This can also be seen on the graph…That’s it — 4 points!!
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Get the Math and Points Aug 2014 CC Alg I Regents #4
Let’s go one-by-one through the answer choices:
(1) Median is the middle number
Since there are 4 data points, we take the average of the middle two.
For Company 1, the average of 32,000 and 35,000 is not greater than 37,000 and for company 2, the average of 35,500 and 37,000 is also not greater than 37000.
(2) The mean salary: add them up and divide by 4…the 4 numbers for Company 1 are 30, 32, 35 and 38 while the 4 for Company 2 are 29, 35.5, 37 and 65…that 65 is going to make the mean salary of Company 2 greater than Company 1
(3) Range = High – Low
Company 2 Range = 65,000 – 29,000
Company 1 Range = 38,000 – 30,000
The salary range in company 2 is greater than the salary range of company 1
(4) Mean Age company 1 = (25 + 27 + 28 + 33)/4 = 113/4
Mean age company 2 = (25 + 28 + 29 + 31)/4 = 113/4
The mean age is the same at both companies
2 points :)
Get the Math and Points! Aug 2014 CC Alg I #16
We will try n = 3 and n = 5 in each equation to see if the 3rd term is 10 and the 5th term is 26.
Using each answer with n=3 and looking for an answer of 10:
(1) 8n + 10, substitute n = 3, 8(3) + 10 = 34 not 10!
(2) 8n – 14, substitute n=3, 8(3) – 14 = 10 keep this one
(3) 16n + 10, substitute n=3, 16(3) + 10 = 58 not 10!
(4) 16n – 38, substitute n=3, 16(3) – 38 = 10 keep this one
Now we have narrowed it down to either answer (2) or (4)
The fifth term is 26 so when n = 5, the answer should be 26
(2) 8n – 14 substitute n = 5, 8(5) -14 = 26!!!!
(4) 16n – 38, substitute n=5, 16(5) – 38 = 42 (not 26!)
That’s it for 2 more points!! :)
When Will We Use Math? ACCUPLACER and COMPASS
In addition to Learn Pass Graduate for the Regents exam (more specifically, Common Core Algebra I) needed for a HS diploma in NY, there are other reasons to learn Math like being savvy about Finance, building critical thinking skills and developing persistence. Click here for The Benefits of Learning Math.
There is another super important reason to learn Math: Placement testing!
Especially at the community college level — this goes for reading and writing as well.
If you can pass the placement test, you can take credit bearing non-remedial classes (if you do not pass the placement test, you can only take non-credit bearing remedial classes).
Look at these requirements from Herkimer Community College in upstate NY:
http://www.herkimer.edu/apply/student-testing-advisement-registration-transition-start/
Many colleges use ACCUPLACER, made by the College Board, for their placement testing. Here is a pdf of ACCUPLACER sample items and a free web based ACCUPLACER Study App
Some colleges use COMPASS, made by ACT, for their placement testing.
Here is a pdf of COMPASS sample items.
Learning Math gives people opportunity and options for career and college!!
Get the Math and Points CC AlgI Regents Aug 2014 #21
This is great practice for generating the Y= using the TI-84 linear regression feature
We must create 2 lists with Stats, Edit
Put the x values into L1 and the y values into L2
If there is already data in a list, press the up arrow until you get to L1 (or L2) and press clear, enter
Then Stats, right arrow, Calc, 4 enter for Linear regression and there you have it!!!
The equation of the line…match it up with one of the answers :)
Math Confidence by Robin the Math Lady 