Question

This was an exceptionally dry year for portions of the southwestern United States. Monthly precipitation in Phoenix, Arizona, was recorded in the table and is modeled by y = –0.04088x2 + 0.4485x + 1.862.

In what month did Phoenix receive the lowest amount of precipitation?


Month (x)

Precipitation

January

2.27 inches

February

?

March

?

April

?

May

?

June

?

July

?

August

?

September

2.59 inches

October

?

November

?

December

?



Sketch a graph or fill in the table to answer the question.
January
February
November
December

Answer 1

home work or test q
uestion

Answer 2

regular assigment

Answer 3

Hello?

Answer 4

Can you screenshot the table please.

Answer 5

okay well can you like show us the table

Answer 6

These are the answers: January
February
November
December

Answer 7

its not january btw

Answer 8

?

Answer 9

dang this might take me a little bit

Answer 10

Im just happy for any help

Answer 11

well josh is typing witch means he has the answer so if i don't back in time he has it

Answer 12

hes been "typing" for over 6 min.

Answer 13

?

Answer 14

So to start off, you should know that the precipitation is y and the month is x (as shown).

Now, to solve for what the x is in each of these months, you must solve for x by using the given precipitation amounts.

e.g. for this one, you would have to do January and September's y values.

\(\sf{2.27 = -0.04485(x)+1.862}\)
and
\(\sf{2.59 = -0.04485(x)+1.862}\)

All you have to do here is solvee for x, get what it is, and see how the values should change.

January:
\(\sf{2.27 = -0.04485(x)+1.862}\)
\(\sf{0.41 = -0.04485(x)}\)
\(\sf{0.37 = x}\)

You can repeat that for September and get what x is, and between the two datess, you can figure out what the average precipitation is.



Best of luck,
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Answer 15

Thank you so much!

Answer 16

Of course!

Answer 17

see told u