The band director of Eagle Rock High School asks her students to have a carwash as a fundraiser. They are going to charge $7.50
per car. The graph that represents the situation is shown below.
Key Features to Graphs x and y intercept
Which of the following statements about the graph are true? Select all that apply.
True False
The graph represents a function since every input value corresponds to exactly one output value
The amount of money in the band fundraiser account represents the input values.
The graph has an x - intercept.
The number of cars washed relates to the amount of money in the band fundraiser account.
Key Features to Graphs x and y intercept
Which of the following statements about the graph are true? Select all that apply.
True False
The graph represents a function since every input value corresponds to exactly one output value
The amount of money in the band fundraiser account represents the input values.
The graph has an x - intercept.
The number of cars washed relates to the amount of money in the band fundraiser account.
1 answer:
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Answer:
Step-by-step explanation:
<h3>Exponent rule:</h3>In exponent multiplication, if bases are same, add the exponents.
The table in the attached figure
<span>Pennies made before 1983
</span>Part a) find the mean
we have
[3.1047,3.1082, 3.1582, 3.0776, 3.1276, 3.1035]
Mean 1=[3.1047+3.1082 + 3.1582 + 3.0776 + 3.1276 + 3.1035]/6
Mean 1=3.1133 grams
the answer part a) is
The mean weight of the pennies made before 1983 is 3.1133 grams.
Part b)
to find the Median, place the numbers in value order and find the middle.
[3.1047,3.1082, 3.1582, 3.0776, 3.1276, 3.1035]
[3.0776, 3.1035, 3.1047,3.1082, 3.1276, 3.1582]
(3.1047+3.1082)/2=3.10645 grams
the answer part b) is
The median weight of the pennies made before 1983 is 3.10645 grams.
<span>Pennies made after 1983
</span>Part c) find the mean
we have
[2.4842, 2.4828, 2.5024, 2.4997, 2.4907, 2.4956]
Mean 2=[2.4842 + 2.4828 + 2.5024 + 2.4997 + 2.4907 + 2.4956]/6
Mean 2=2.4926 grams
the answer part c) is
The mean weight of the pennies made after 1983 is 2.4926 grams.
Part d)
to find the Median, place the numbers in value order and find the middle
[2.4842, 2.4828, 2.5024, 2.4997, 2.4907, 2.4956]
[2.4828, 2.4842, 2.4907, 2.4956, 2.4997, 2.5024]
[2.4907 +2.4956]/2=2.49315
the answer part d) is
The median weight of the pennies made after 1983 is 2.49315<span> grams.
</span>
Part e) compare the means
<span>Find the percentage difference
</span> the percentage difference is the difference between the new value and the old value, divided by the old value
so
new value=2.4926 grams
old value=3.1133 grams
[3.1133-2.4926]/3.1133------> 0.20-----> 20%
that means
<span>the difference in the means is considerable to be greater than 5%</span>
<span>Pennies made before 1983
</span>Part a) find the mean
we have
[3.1047,3.1082, 3.1582, 3.0776, 3.1276, 3.1035]
Mean 1=[3.1047+3.1082 + 3.1582 + 3.0776 + 3.1276 + 3.1035]/6
Mean 1=3.1133 grams
the answer part a) is
The mean weight of the pennies made before 1983 is 3.1133 grams.
Part b)
to find the Median, place the numbers in value order and find the middle.
[3.1047,3.1082, 3.1582, 3.0776, 3.1276, 3.1035]
[3.0776, 3.1035, 3.1047,3.1082, 3.1276, 3.1582]
(3.1047+3.1082)/2=3.10645 grams
the answer part b) is
The median weight of the pennies made before 1983 is 3.10645 grams.
<span>Pennies made after 1983
</span>Part c) find the mean
we have
[2.4842, 2.4828, 2.5024, 2.4997, 2.4907, 2.4956]
Mean 2=[2.4842 + 2.4828 + 2.5024 + 2.4997 + 2.4907 + 2.4956]/6
Mean 2=2.4926 grams
the answer part c) is
The mean weight of the pennies made after 1983 is 2.4926 grams.
Part d)
to find the Median, place the numbers in value order and find the middle
[2.4842, 2.4828, 2.5024, 2.4997, 2.4907, 2.4956]
[2.4828, 2.4842, 2.4907, 2.4956, 2.4997, 2.5024]
[2.4907 +2.4956]/2=2.49315
the answer part d) is
The median weight of the pennies made after 1983 is 2.49315<span> grams.
</span>
Part e) compare the means
<span>Find the percentage difference
</span> the percentage difference is the difference between the new value and the old value, divided by the old value
so
new value=2.4926 grams
old value=3.1133 grams
[3.1133-2.4926]/3.1133------> 0.20-----> 20%
that means
<span>the difference in the means is considerable to be greater than 5%</span>