To make a reflection over the y axis, make the whole equation negative.
The new equation should look like this:
f(x) = -x^3
First, note that
Then

Consider all options:
A.

By the definition,

Now

Option A is true.
B.

By the definition,

Then

Option B is false.
3.

By the definition,

Now

Option C is false.
D.

By the definition,

As you can see
and option D is not true.
E.

By the definition,

Then

This option is false.
54 is the hypotenuse because it is the longest side. Square all of the sides. So 54^2=2916
51^2=2601
22^2=484
Now you have 2916=2601+484
Add the two and they will be greater than 2916. Because of that, you will have an acute triangle because 22^2+51^2>54^2
In short, its B
Answer:
A, C, E
Step-by-step explanation:
From the table you can see that the water depth cahnges

for every
of snow (option B is false).
This means that the function modelling this situation is linear function (option A is true and option D is false). Let the equation of this function be
Then

Subtract these two equations:

Hence,

The equation of the straight line (the graph of linear function) is
(option E is true) This line passes through the point (0,0), because its coordinates satisfy the equation (option C is true).