OMG this is 2 points for everyone!! A giveaway!! Get your TI-84 ready!!!!
Put the equation into Y= and look for the zeros on the table and the graph.
For what x values is y = 0? Look at the table and the graph to verify your answer!!
Category Archives: Common Core Algebra I
Get the Math and the Points: June 2016 CC Algebra I Regents #11
Which comes first in the alphabet, x or y? d or r?
Domain means the x values and Range means the y values
So we’re gonna graph this and check out the y values:
Looking at the graph, the lowest y value is less than -1. which can also be seen in the table above.
This gets rid of answers (3) and (4).
Are the y values greater or less than -9?
That’s it, 2 points.
Get the Math and Points: CC Algebra I June 2016 Regents #16 plus Metacognition
Inspired by this tweet:
Looking at our latest Algebra I Regents, here in NY, here is a great example of the use of a graphing calculator and compare/contrast/use metacognition:
All 4 answer choices have a 3 but in different and important places!!
First question, does this xy table look like it is for a linear function?
We can look at the equations and see which f(x) = mx + b
We can also use the TI-84 and check the table to see if it matches the table above!
Let’s go to the graphing calculator:
Answer choice (1) below: this is linear and is clearly not a match especially since the rate of change is always 3 (every time x goes up by 1 y goes up by 3)
Answer choice (2) below is also linear as it has a constant rate of change…not a match:
Answer choice (3) is shown below and, well, we’re still lookin’:
Answer choice (4) is below!!
2 points!!
These answers choices can be used to compare/contrast similarities and differences in their parent functions (linear, cubic and exponential).
Get the Math and the Points June 2016 CC Alg I Regents #9
First distribute the 5
3x + 2 ≤ 5x – 20 subtract 3x from both sides: 2 is on the left side and the right side is 2x -20
2 ≤ 2x – 20 now add 20 to both sides
22 ≤ 2x divide both sides by 2
11 ≤ x now match with the answer
Get the Math and the Points: June 2016 CC Alg I Regents #8
Certainly answer (2) 750 minutes is a LOT longer than 12.5 seconds.
Answer (4) is more than half an hour (.5 hours)
Since 12.5 seconds is less than a minute we can find our answer from the remaining two answers pretty easily:
PS Dan is pretty fast!! https://www.quora.com/Whats-a-good-100m-sprint-time
Math Confidence by Robin the Math Lady 