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Answer:
36 people of them did not have a beach umbrella.
Step-by-step explanation:
Proportion states that the two ratios or fractions are equal.
Let x represents the number of people did not have a beach umbrella.
As per the statement:
Bella saw that 7 : 11 people brought an umbrella to the beach.
Out of 11 people, only 7 people brought an Umbrella to the beach.
Remaining people did not brought an Umbrella to the beach = 11 -7 = 4 people
It is also given that there were 99 people there.
then by definition of proportion:
By cross multiply we have;
Divide both sides by 11 we get;
Simplify:
x = 36 people.
Therefore, 36 people of them did not have a beach umbrella.
Answer:
(a) The data set is a function, since for each input value {3,4,6,11} there is a single output value {5,7,11,21}
(B) A function is a mathematical relationship that associates one or more inputs with a single output value. So that the data set is not a function, there should be - for one or more values of the input - more than one output.
for example, if for the input value {3} there were two outputs {5, -5} then, the data set would not be a function.
The frelation is not a function because:
When x = 1, y = +1 and y = -1.
(c) The set of data provided can be represented by the equation of a line of the form y = mx + b
The slope is:
m = 2
b = 5 - 2*3
b = -1
Then, the function is:
y = 2x-1
You can substitute any of the points shown in the equation and check that equality is satisfied, for example:
(11 , 21)
y = 2 (11) -1
y = 22-1
y = 21. The equation is satisfied. The same goes for the rest of the values.