Use a graphing calculator to determine which equation for the line of regression, Pearson product-moment correlation value (r),
and predicted value match the data in the chart. The chart below shows the number of hours a student spent studying for a math test and the score the student earned on the test. Hours Spent Studying | 0.5|1.25| 1.5 |1.75 |2 | 2.5 |3 |3.5 |4 |
Test Score,,,................ | 90 | 75| 60 | 83 |75| 80| 99| 97| ? |
A) y = 6.4x + 69.5, r = 0.48
Predicted test score for 4 hours of study equals 95.
B) y = 6.1x + 74.5, r = 0.48
Predicted test score for 4 hours of study equals 99.
C) y = 5.1x + 74.5, r = 0.88
Predicted test score for 4 hours of study equals 95.
D) y = 7.4x + 69.5, r = 0.88
Predicted test score for 4 hours of study equals 99.
Test Score,,,................ | 90 | 75| 60 | 83 |75| 80| 99| 97| ? |
A) y = 6.4x + 69.5, r = 0.48
Predicted test score for 4 hours of study equals 95.
B) y = 6.1x + 74.5, r = 0.48
Predicted test score for 4 hours of study equals 99.
C) y = 5.1x + 74.5, r = 0.88
Predicted test score for 4 hours of study equals 95.
D) y = 7.4x + 69.5, r = 0.88
Predicted test score for 4 hours of study equals 99.
1 answer:
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Answer:
4.2 cubic inches
Step-by-step explanation:
Find the diagram attached
Volume of the rectangular pyramid = BH/3
B is the base area
H is the height of the pyramid
Given
Base area = 3.2in * 1.4in
Base area = 4.48sq. in
Height = 2.8in
Volume of the rectangular pyramid = 4.48*2.8/3
Volume of the rectangular pyramid = 12.544/3
Volume of the rectangular pyramid = 4.2 cubic inches
Answer:
Using Geometry to answer the question would be the simplest:
Step-by-step explanation:
Remembering the formula for the area of a triangle which is . One can then tackle the question by doing the following:
Step 1 Find the y-intercepts
The y-intercepts are found by substituting in .
Which gives you this when you plug it into both equations:
So the y-intercepts for the graphs are , and
respectively.
Now one has to use elimination to solve the problems by adding up the equations we get:
Now to solve for the y component substitute:
Therefore, the graphs intersect at the following:
Now we have our triangle which is accompanied by the graph.
now to solve it we must figure out how long the base is:
The height must also be accounted for which is the following:
Now the formula can be used:
