3. Select the correct answer.
Line AB and Line BC form a right angle at point B. If A = (-3, -1) and B = (4, 4), what is the equation of Line BC?

(A.) x + 3y = 16
(B.) 2x + y = 12
(C.) -7x − 5y = -48
(D.) 7x − 5y = 48

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

the correct answer is 1.7

the formula of a midpoint between a abd b: