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goldfiish [28.3K]
2 years ago
13

A teacher gathered data about the number of hours her students spent studying for a test and their resulting test grades. She fo

und that on average, for every 30 minutes studied, the grade increased by 8 points. Which statements about this relationship are true?
Mathematics
1 answer:
In-s [12.5K]2 years ago
5 0

Answer:

A. The data set would have a linear association.

C. The data set would have a positive correlation.

E. Every student earns 16 more points for each additional hour they study.

F. Students that study more tend to earn better grades on the test.

Step-by-step explanation:

Since in the question it is mentioned that the teacher obtained data with regard to the number of hours that students spent for their test and on their results. She found that on an average for each 30 minutes studied, the graded would rise by 8 points

Now this kind of relationship represents the linear association, positive correlation and study more earn better

Therefore the above three statements are true

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Last year the population of Spoon Forks grew from 1250 to 1300. If the population of the town grows by the same percent this yea
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4 0
2 years ago
An object launched vertically from a point that is 37.5 feet above ground level with an initial velocity of 48.6 feet per second
Elis [28]

Answer: 3.675 seconds

Step-by-step explanation:

Hi, when the object hits the ground, h=0:

h=−16t^2+48.6t+37.5

0=−16t^2+48.6t+37.5

We have to apply the quadratic formula:  

For: ax2+ bx + c  

x =[ -b ± √b²-4ac] /2a  

Replacing with the values given:  

a=-16 ; b=48.6; c=37.5

x =[ -(48.6) ± √(-48.6)²-4(-16)37.5] /2(-16)  

x = [ -48.6 ± √ 4,761.96] /-32

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Positive:  

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Negative:  

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Feel free to ask for more if needed or if you did not understand something.  

8 0
3 years ago
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