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

Question

Answers

A. 

x + 3y = 16

B. 

2x + y = 12

C. 

-7x − 5y = -48

D. 

7x − 5y = 48

Answer 1

Slope of line AB passing through (-3,-1)

and (4,4)

Slope =( 4+1)/(4+3)= 5/7

Slope of line at 90 degree

= -1/m= -7/5

So equation of BC

Y= mX +b

Y = -7/5X +b as it passes through B (4,4)

4 = -7/5(4) +b

b=48/5

Y = -7/5 X +48/5

5Y +7X =48

or

-5Y -7X = -48

is the correct option