I need help please.

3/8

Step-by-step explanation:

well there are 2 S and 1 R and it ask what the probability that she will select the letter "S" and the letter "R" and there are 8 letters in total so the answer would be 3/8.

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