Which graph represents a function?
2 answers:
Answer: The correct graph is the last one. Its image is attached.
Step-by-step explanation:
We are given the figures of four different graphs. We are to select the one which represents a function.
On a graph paper, a function is defined as follows:
<u>FUNCTION:</u> A graph on the co-ordinate plane represents a function if one value of 'x' corresponds to only one value of 'y'
That is, one value of 'x' cannot give two different values of 'y'.
We can see that
In graph (1), x = 1 corresponds to y = 3, -2.
In graph (2), x = 2 corresponds to y = 2, -2.
In graph (3), x = -3 corresponds to y = 2, -2.
So, these three graphs does not represent functions.
But, in graph (4), one value of 'x' gives only one value of 'y'.
For example, if x = 1, then y = 0
if x = 0, then y = 0, etc.
Therefore, graph (4) represents a function. Its image is attached.
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Since, the number w and 0.8 are additive inverses.
A number 'a' is said to have an additive inverse '-a' if "a+ (-a)= 0".
Since, 'w' and '0.8' are additive inverses of each other such that
Therefore, the value of 'w' should be '-0.8' so that .
So, the value of 'w' is =0.8
Now, Refer to the attached image which represents the position of 0.8 , w ( that is -0.8) and the sum of 0.8 and w.
Sum of 0.8 and w = 0.8 + w
= 0.8 +(-0.8)
= 0.
