Encuentre el foco y la directriz de las siguientes parábolas

answer: procent 54 wynosi 33,33%

answer: i don't understand it

step-by-step explanation: sorry

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