If a point aka ordered pair is a solution, it will appear on the table as the (x,y) will make the equation true.
Check all the “easy” x values that are integers (x = 0, x = 5, x = -1) — which y value in the answer choice does not match that of the table?
Look at where the graph crosses the x axis…then check those x values by seeing that the y value is 0 on the table. Students can also prove their answer by substituting the x values into the equation to see if the result is 0.
Shout out to New York the Empire State aka the Regents State! The Regents is coming!
CC Algebra I is the most important Regents as s’s need at least 1 Math Regents to graduate and Alg I is so much more accessible than Geo or Alg II.
The best prep: Do Regents questions!!
There are certain questions that all and I mean ALL students should be able to answer correctly and get 2 points! Too often, students have not seen all the content and/or are not adept at the TI-83/4 calculator.
Make sure that you and your student(s), teacher(s) feel empowered to take the exam and learn Math in the process 🙂
Here is a link to the Bible of Algebra I (thanks to the jmap folks!)
If you prefer, you can call it an OED of Algebra I or the Primer of Algebra I.
This question asks for absolute value which can be found either in the Math menu or using catalog (2nd, zero) and abs comes up right away because it begins with an A 🙂
Domain means x values and Range means y.
D comes before R in the alphabet and x is before y.
This problem gives us x values so use them to find y.
f(x) = 2x^2 – 8
f(-2) = 2(-2)^2 – 8 = 2(4) – 8 = 0 (This narrows it down to answers (3) or (4)!)
f(3) = 2(3)^2 – 8 = 2(9) – 8 = 10 (This makes the answer jump out at ya!)
f(5) = 2(5)^2 – 8 = 2(25) – 8 = 42
Can also use the table from the TI-84 🙂