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crimeas [40]
3 years ago
9

Which function family are these 3? thanks..​

Mathematics
2 answers:
Julli [10]3 years ago
7 0

Answer:

1) Function; Linear Function (y=x)

2) Function; Exponential Function (y=bˣ)

3) Not a function.

Step-by-step explanation:

So, let's go through each table of values. I'm also going to graph them (see attached graphs) because it will make things simpler and provide a visual.

First, also recall what the definition of a function is. A function is a function if and only if an x only has <em>one</em> distinct y-value. No x can have two or more y-values. For instance, (1,2) and (1,3) is <em>not</em> a function between the x repeats. So, let's go through the choices:

1)

We have the table as shown. Let's plot the points. See TABLE 1:

First, there are no repeating x-values, so we can be sure that this is indeed a function.

Looking at the graph, we can see that this resembles a linear graph. So, the parent function of this is a line.

The parent function of a line is:

y=x

So, table 1 is associated with a linear function.

2)

Let's again plot the points. See TABLE 2.

Again, there are no repeating x-values, so this is also a function.

Looking at the graph, this resembles an exponential function. The function increases slowly at first but starts increasing increasingly fast. The parent function is thus an exponential function.

So, table 2 is associated with an exponential function.

3)

First, notice how all the x-coordinates are repeating. And since they do <em>not</em> equal the same thing, this is not a function.

Table 3 is not a function and so has no corresponding family function.

Vaselesa [24]3 years ago
3 0

Note that a function has one x-value assigned to one y-value. If an x-value has more then one y-value then it is not a function.

Question 1:

No x value is given more then y value so this is a function.

If we plot the points, it goes up in a steady line. Thus, this makes it a linear function since it has one slope.

Question  2:

No x value is given more then y value so this is a function.

If we plot the points, it starts going up at a slow pace. After a while, the points go up at a fast pace making it where it doesn't have one slope. Since its a curve like function, it is exponential.

Question 3:

All x values are the same but with different y-values. Thus, makes this not a funtion.

Best of Luck!

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In Psychology 101, the ratio of the number of girls to the number of boys is 3:1. After one girl drops the class and three more
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Alright, lets get started.

Suppose the initial number of girls = x

Suppose the initial number of boys = y

The ratio of the number of girls to the number of boys is 3:1 (given in question)

x/y = 3/1

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x = 3 y ...............................equation (1)

one girl drops the class and three more boys sign up means new number of gilrs = x - 1

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the ratio of the number of girls to the number of boys becomes 5:2

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Cross multiplying

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Adding 2 in both sides

2 x - 2 + 2 = 5 y + 15 + 2

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Subtracting 5 y in both sides

6 y - 5 y = 5 y + 17 - 5 y

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After the changes, 3 more boys sign up : 17 + 3 = 20 new number of boys

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Hope it will help :)

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