Let’s assume that following is true “The better are statistics teachers, the better are their
students’ grades”. In a statistical analysis this
relationship would be reflected in a
a) Nonsignificant positive correlation
b) Nonsignificant negative correlation
c) Significant positive correlation
d) Significant negative correlation

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

the answer to this question is 3/19

step-by-step explanation:

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply