Question

Help please, i don't know what to do for b. I've did a which is -2

Answer 1

y=-2x+6

Explanation:

So you know the perpendicular gradient is -2 so the equation so far is y=-2x+?

Find the midpoint of AB which is:

(3,0)

Using this, plug it into the equation you've formed:

0= -6 + ?

? = 6

So the equation of the perpendicular line is y=-2x+6