Question

There are three points: A (1, -2) B (2,-1) AND C (x,y). It is given that AB is perpendicular to BC.
1. Express y in terms of x.
2. If (-2,a) is on the line BC, find the value of a

Answer 1

Answer:

1. y=x-3

2. a=-1

Step-by-step explanation:

when the lines are perpendicular product of their slope is -1

solving

$\frac{-1+2}{2-1}*\frac{y+1}{x-2}=-1$

solving it we get

y=1-x

now whiting the equation of line BC

y+1= -1*(x-2)

now putting (-2,a) in equation we get

a=-1

Answer 2

Answer:

Hot you with that DDU-DU DDU-DU! Hope it helps you!