I. Doubling is definitely exponential

II. 1 inch every 4 days is a linear function

III. 5% every 3 years is a percent change and is therefore exponential

# Category Archives: #mtbos

# Get the Math and the Points Aug 2018 CC Algebra I Regents #22

Since this question does not ask us to solve, we can look at the structure of the equations.

We need to first notice that the second equation in all the answer choices is identical to the one given.

Therefore, all of our energy should be directed at the top(first) equation so we will compare the top equations in all 4 answers.

The correct answer will be a multiple of the top given equation:

Answer (1): -2x – 2y = -6 *almost* looks like -2(x – y =3)

Answer (2): -2x + 2y = 3 (if you multiply -2(x – y =3), the right hand side will have to be -6

Answer (3): 2x – 2y = 6 (this looks a LOT like x – y = 3!!!)

Answer (4): 3x + 3y = 9 *almost* looks like 3(x – y = 3) but not quite

# Get the Math and the Points Aug 2018 CC Alg I #21

There is correlation but not causation. So (1) and (2) cannot be correct.

Pay close attention to the wording — that’s it — 2 points on the Regents 🙂

# Get the Math and the Points CC Algebra I Regents Aug 2018 #20

we can try n = 1 and see if -27 is the output

(1) 15 – 27(1)

(2) 15 – 27(1 – 1)

(3) – 27 + 15(1)

(4) – 27 +15(1 – 1)

# Get the Math and the Points Aug 2018 CC Alg I Regents #19

The two red marks are where f(x) = g(x), neither of which lie on the axes.

The x-intercepts would be on the x-axis and the y-intercepts would be on the y-axis.

The other clue is that solutions are x values.