Which graph would best show parts of something that sum up to a meaningful whole? a. circle graph b. line graph c. bar graph d. pictograph

i belive those are the ones that are under 90 degreese.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c