All posts by mathconfidence

Get the Math and the Points!! CC Geo #2

From the January 2016 Common Core Geometry Regents

Jan 2016 Geo Regents 2

This is a graphing calculator question so into Y= we go.
Y1 = -1/2x -5  (the blue line)  slope of -1/2 and y-intercept of (0,-5)
Then we will try all the choices until we find THE ANSWER!!
ok here we go…answer (1) into Y2 (see below)…um, not perpendicular, in fact, incredibly parallel as y = -1/2x + 4 also has a slope of -1/2

CC Geo Jan 2016 2a

ok, ready for answer (2) into Y2?  Here it is…looks mighty parallel (slope = -1/2)

Continue reading Get the Math and the Points!! CC Geo #2

Get the Math and Get the Points #3 Jan 2016 CC Alg I

From the January 2016 Common Core Algebra I Regents:

Jan 2016 Alg I Regents 3

This is a TI-83/4 question:  Put the equation into Y=
Hit 2nd graph to see the table
Make note of the Y values when x =3 and x = 5
Find the difference (subtract) those two values and there you have it!!

(Be careful as both of the values are listed as answer choices but the difference is what is important)

Week 3 27.163    Week 5 10.107  subtract them and you have your answer for 2 points!!

Jan 2016 Alg I Regents 3 (1)

If you don’t want to use the table you can just plug in 3 as the exponent in the equation and get 119.67(0.61)^3 = 27.163  and then plug in 5 as the value of x and get 10.107 and then find the difference.

To further learning, extension questions include:
What kind of function is this?  How do you know?
Is it growing or decaying?  What is the growth/decay rate?
What is the difference between revenue and profit?
Find a recent movie that grossed >$119 million in its first week of release

For student classwork/homework, here is the Word file:
Jan 2016 CC Alg I 3 Get the Math and the Points

 

 

 

 

 

 

Get the Math and Get the Points!! Jan 2016 CC Algebra I Regents #2

From the January 2016 Common Core Algebra I Regents

Jan 2016 Regents A1 2 Gas
This is a reading and noticing question with no TI-83/4 needed.
5 points are shown on this line but only 3 are easy to read: (4,15), (8,30) and (12,45)

Let’s check out each of the multiple choice options:
(1) When x = 10, is y = 35? (look carefully!)
(2) Look at the first point at a ‘crosshair’, (4,15)  divide $15 by 4, what do you get?
You can also use (30 divided by 8 or 45 divided by 12)
(3) When x = 2, is y = 5?  (look carefully!)
(4)  You can still drive if you did not buy gas (as long as there is gas in the tank!!)

For student classwork/homework, here is the Word file:
Jan 2016 CC Alg I 2 Get the Math and the Points

 

Get the Math and Get the Points!! Jan 2016 CC Alg I #1 Notice x!!

As part of the Learn, Pass, Graduate series on the Regents exam, problems from the tests will be featured on a daily basis.
From the January 2016 Common Core Algebra I Regents

Jan 2016 Alg I 1

Jan 2016 Alg I Regents 1

Use your TI-84
Put the equation into Y=, then press graph!!

Read carefully — they want the       x     value of the minimum point
(not the y value which can be seen at (2,4).

This is easy ladies and gents — this is attention to detail.
2 points done!!

This is a great Do Now or exit slip…also easy to do at home 🙂

For student classwork/homework, here is the Word file: Jan 2016 CC Alg I 1 Word