Thx a college professor inputs test scores for the first two tests of the semester to determine the correlation. the scatterplot for the test scores is shown, along with the line of best fit. choose the best estimation for r, the correlation coefficient. a) -0.70 b) -0.30 c) 0.30 d) 0.70

D) 0.70

Step-by-step explanation:

D) 0.70 is correct. As the grades for Test 1 increased, the grades for Test 2 also increased, therefore the trend of the data is positive.

The correlation coefficient is positive, and since the points are close to collinear, D) 0.70 is the best choice.

Hope this helps, have a good day. c;

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.