The information about groundwater recorded by a student is valid when select one: a. it is not biased b. its results cannot be repeated c. it is not obtained from a primary source d. its findings do not have to be shared with others

a. it is not biased

Explanation:

Scientific information can not be biased to be credible and valid, and it is only possible to be sure that this scientific information is true if the results are repeated in different types of experiments and tests. We can not forget that scientific information gains credibility with primary sources that give scientific background to the statements, moreover, the purpose of formulating scientific information is to share information and let everyone know about it.

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

3. dark matter

empty space could also be a simple vacuum