Ateacher gathered data about the number of hours her students spent studying for a test and their resulting test grades. she found that on average, for every 30 minutes studied, the grade increased by 8 points. which statements about this relationship are true? check all that apply. the data set would have a linear association. the data set would have a nonlinear association. the data set would have a positive correlation. the data set would have a negative correlation. every student earns 16 more points for each additional hour they study. students that study more tend to earn better grades on the test.

Step-by-step explanation:

According to the given statement :

A teacher found that on average, for every 30 minutes studied, the grade increased by 8 points.

That the rate of change of marks  ( on average)  with respect to time is increasing by a constant 8 points per 30 minutes.

Since 1 hour = 60 minutes =

⇒ That the rate of change of marks ( on average) with respect to time is increasing by a constant 16 points per hour.  [Since ]

⇒ The set would have a linear association. [when the rate of change of ]

Since marks is increasing with respect to the time therefore, the set would have a linear association.

⇒ Students that study more time tend to earn better marks on the test.

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

answer is : muchas/tipicas

have a nice day!

~recklesschicken