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Sophie
1 month ago
6

Which graph represents an odd function?Answer by using: A, B, C, or D for each graph.

Mathematics
2 answers:
AnnZ [12.3K]1 month ago
6 0

Answer: Option C is the correct graph.

Explanation:

An odd function satisfies the condition,

f(-x)=-f(x)

This indicates that for any point (x,y) on the graph, the point (-x,-y) will also be present.

Why Option C is correct:

Option C includes the point (1,2), which implies the point (-1,-2) must be present.

f(1)=2

Indeed, (-1,-2) is among the points.

f(-1)=-f(1)=-2

Other pairs like (2,3) with (-2,-3), (3,-1) with (-3,1), and (4,0) with (-4,0) are also found. Hence, the function represented is odd.

Why other options are incorrect:

In Option A, (1,3) is given, so at x = -1, y should be -3, but instead y = 1, so it’s not odd.

Option B has (1,0), so at x = -1, y should be 0, but y = -3, so it is not odd.

Option D features (1,-1), meaning at x = -1 y should be 1; however, y = -1, so it's not odd.

AnnZ [12.3K]1 month ago
3 0

The graph displayed in the third position corresponds to an odd function. Choice (C) is correct.

Additional details:

An inverse function reverses the input-output pairs of another function: for f giving y from x, the inverse provides x from y.

The relation links inputs (domain) with outputs (range).

Definition: A function is odd if f\left( { - x} \right) =  - f\left( x \right).

If the points meet \left( {x,y} \right) and \left( {- x,- y} \right).,

Then the points in graph (C): \left( {2,3} \right), \left( {-2,-3} \right), \left( {3, - 1} \right), \left( { - 3,1} \right), \left( {4,0} \right), \left( { - 4,0} \right) and \left( {1,2} \right). have pairs of the form \left( {x,y} \right) and \left( {- x,- y} \right). This confirms the graph depicts an odd function.

Therefore, the third graph corresponds to an odd function. Option (C) is correct.

Learn more:

  1. Explore inverse functions at brainly.com/question/1632445.
  2. Study circle equations at brainly.com/question/1506955.
  3. Understand domain and range at brainly.com/question/3412497.

Details:

Grade: High School

Subject: Mathematics

Topic: Ratio and Proportion

Keywords: proportion, direct proportionality, constant, proportionality equation, y=0.41x, constant of proportionality.

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Answer:

a) Slope: \hat \beta_1 =\frac{7625.9}{1248.9}=6.106

Intercept: \hat \beta_o = 157.955 -6.106 (69.686)=-267.548

b) r=\frac{7625.9}{\sqrt{[1248.9][94228.8]}}=0.657

Additionally, the coefficient of determination is r^2 = 0.657^2 =0.432

Step-by-step explanation:

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n=110, \sum x_i y_i = \sum (X-\bar X)(Y-\bar Y) =7625.9,\sum x^2_i=\sum (x-\bar x)^2 =1248.9, sum y^2_i=\sum(y-\bar y)^2 =94228.8

\sum Y_i =17375, \sum X_i = 7665.5

Part a

The slope can be calculated using this formula:

\hat \beta_1 =\frac{\sum (x-\bar x) (y-\bar y)}{\sum (x-\bar x )^2}

Following the substitutions, we have:

\hat \beta_1 =\frac{7625.9}{1248.9}=6.106

The intercept can be determined with this formula:

\hat \beta_o = \bar y -\hat \beta_1 \bar x

Average values for x and y can be calculated this way:

\bar X=7665.5/110 =69.686, \bar y= 17375/110=157.955

Replacing yields:

\hat \beta_o = 157.955 -6.106 (69.686)=-267.548

Part b

The correlation coefficient can be calculated using the following formula:

r=\frac{\sum (x-\bar x)(y-\bar y) }{\sqrt{[\sum (x-\bar x)^2][\sum(y-\bar y)^2]}}

In our situation:

n=110, \sum x_i y_i = \sum (X-\bar X)(Y-\bar Y) =7625.9,\sum x^2_i=\sum (x-\bar x)^2 =1248.9, sum y^2_i=\sum(y-\bar y)^2 =94228.8

We can compute the correlation coefficient by substituting values:

r=\frac{7625.9}{\sqrt{[1248.9][94228.8]}}=0.657

The coefficient of determination is r^2 = 0.657^2 =0.432

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