In the xy-plane, line L and K are parallel.Line Lpasses through the point (-1,-6) and the vertex of the parabola with the equation y=-2(x-1)^2+2 if the point (r,s) lies on the line K, which of the following is another point on line K

A) (r+1, s+4)

B) (r-1, s+4)

C) (r+1,s-4)

D) (r+4, s+t)

E) (r-4, s-4)

Solveit Dec 17, 2015

#2**+15 **

Hi Solveit,

In the xy-plane, line L and K are parallel.Line Lpasses through the point (-1,-6) and the vertex of the parabola with the equation y=-2(x-1)^2+2 if the point (r,s) lies on the line K, which of the following is another point on line K

A) (r+1, s+4)

B) (r-1, s+4)

C) (r+1,s-4)

D) (r+4, s+t)

E) (r-4, s-4)

Do you still need and answer to this question - it is a bit old now.

I'll just give you an outline,

L passes thought (-1,-6) and (1,2) so the gradient of L is (2--6)/(1--1) = 8/2 = 4/1

K is a paralel line

one point on k is (r,s) so another point would be (r+1,s+4) [ run 1 ans rise 4]

So A is the answer.

If you need me to draw a pic or something, Let me know :)

Melody Dec 18, 2015