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Steven Chen
This the picture that I took last week when I attented a football match

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This is the photo of the landscape in Tokyo.

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This is the railway of a rollercoaster.

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This is one of my birthday present that I received last year. To solving the questions, I firstly take a picture of it and use desmos to draw a quadratic function. Then I can find zeros, maximum and the number of turning points. Also, though the maximum point, I can find it's pattern easily.

▶️Increasing:

(-∞，7)

Decreasing:

(7, +∞）

▶️End behavior:

x👉+∞，y👉+∞

x👉-∞，y👉-∞

▶️zeros：

（-0.822，0）

（0.822，0）

▶️maximum：

（0，7）

▶️minium：

none

▶️turning points：

1

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The shape of cookie has severally cubic polynomial   function. I choose one of them to calculate

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This is the logo of a football club called Liverpool, which is one of my favorite team. I find that it forms a quartic polynomial function.

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The hook has the shape of the letter S, or the shape of a cubic polynomial.

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This picture is my scissor.

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Anna
This is a picture I took when I went out with my father during National Day holiday. The curve of the mountains is like a polynomial graph

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This is the picture I had took when I went climbing the mountain
The ridge is like a quartic equation.

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Henry. This is the picture of the birthday party of our Chinese class teacher. Everyone in our class is in it. 

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Henry. This is the picture of the birthday party of our Chinese class teacher. Everyone in our class is in it. 

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I choose this logo from my Evisu jeans.

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I choose the wire in my classroom as my curve.

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It was one of the biscuits that I ate today！！The shape of the biscuit happened be a heart(≧▽≦)The upper curve of the heart is a polynomial curve.There are only few heart-shaped biscuits in one bag，so if you pick one of them by chance，that means you are lucky！

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It’s the curve from a small part of a roller coaster.

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this is my pick for the guitar

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✨Increasing:

(－∞, －2.593】

(O.6， 2.6】

✨Decreasing：

(－2.593, 0.6】

✨End behavior:

X→﹢∞, y→﹢∞

X→﹣∞, y→﹣∞

✨Maximum/minimum: None (Because I think it is a cubic function, so there is no max/min.)

✨Turning points:

(-2.593, 1.001)

(0.22, 0)
✨Zeros
(-4, 0)
(0.22, 0)

💨👻Firstly, I place my picture of roller coaster in a position which I can identify the zeros easily. Then I confirm the X-intercepts and Y-intercepts. Next, I choose a random point on my graph to calculate the value of a. 😜😳

Finally, when I check my graph, I use the point (-1.5, 0.665) to make sure it fits my function. 0.0899×2.5×2.9584=0.6649≈0.665. So I can say that the function is suitable to my graph.😌😌😌

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Increasing:
（-∞，-2.188］
［0.669，2.081］
Decreasing:
（-2.188，0.669）
（2.081，∞）
End behavior
Even
x➡️±∞，y➡️-∞
Zeroes
(-3.25,0)(0,0)(1.5,0)(2.5,0)
Maximum
(-2.188,0.51)
Turning points
(-2.188,0.51)(0.669,-0.051)
(2.081,0.034)
I put the picture on the graph so that I can find four zeros for the Quatic function. Then, I use another point to determine the a of the factor form of this function. In the last, I use one of the turning point to reassure my expression is correct .

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This is an sexy apple with fetching polynomial curve

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This is a clip I use to fix my bang, and it is constituted of two parts. On the edge of its outer part, I found a polynomial shape.

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it's the logo of this car, this photo was took in a cars show. a famous car company faw-volkswagen. Although it's a litle bit abstract, it has the opportunity to draw a polynomial curve inside like i showed.

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Rex

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Even end behaviour +positive leading coefficient