How can the graph be used to predict the output (y- value) associated with an input of 3 1/2
1 answer:
The method to estimate the y - value from a graph is discussed below.
We have a graph.
We have to estimate how can the graph be used to predict the output (y- value) associated with an input of x = =
= 3.5
A diagram showing the relation between variable quantities, typically of two variables, each measured along one of a pair of axes at right angles.
According to the Question -
Assume that you have a graph plotted for the straight line given by -
y = 2x + 5 ...(1)
(Refer to the figure attached)
The x values are plotted along the horizontal line and the y values are plotted along the vertical axis. You can see in the diagram that for x = or 3.5 the corresponding value for y is 6.8. You can repeat the same process for almost any value of x. Similarly, you can find out the value of y without using graph. For x = 5, using Eq (1), we get -
y = 2 x 5 + 5 = 15
Hence, using this way you can predict the y - value for any input.
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Answer: b) 84
Step-by-step explanation:
Let p be the prior estimate of the required proportion.
As per given , we have
p =0.5 (The probability of getting heads on a fair coin is 0.5)
Significance level :
Critical z-value (using z-value table ) :
Confidence interval width : w= 0.18
Thus , the margin of error :
Formula to find the sample size ( if prior estimate of proportion is known.):-
Substitute the values , we get
Simplify ,
[Round of to the next whole number.]
Hence, the number of times we would have to flip the coin =<u>84</u>
hence, the correct answer is b) 84