Math help/ Algebra 2 question. Please Help!?

2018-03-16 5:48 am

1.
x f(x)
4 105
5 384
6 945
7 1920
8 3465
9 5760

The table of values represents a polynomial function f(x).

How much greater is the average rate of change over the interval [7, 9] than the interval [4, 6] ?

2.
The function f(x) is the height of an object x seconds after it is thrown in the air. The object reaches its maximum height in 2 s, and hits the ground at 5 s.

What is the practical domain for the function f(x)?

a.) [0, 5)

b.) all real numbers

c.) [0, 5]

d.) whole numbers in [0, 5]

3.
Which characteristic is correct for the function f(x)=−2x^4+3x^2 ?

a.) both even and odd

b.) odd

c.) neither even nor odd

d.) even

回答 (1)

用戶57799

2018-03-16 6:10 am

1) From [7, 9] = (5760-1920)/2 = 1920
From [4, 6] = (945-105)/2 = 420
Answer 1920 - 420 = 1500
2) Domain = [0,5]
Answer c)
3) f(x) = f(-x)
It is even
Answer d)
See graph
https://www.desmos.com/calculator/tuamy9gfv4

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