For what value of k will the graph of 6x + ky = 6 be perpendiculuar to the graph of 2x – 6y = 12?
1/2
4
2
5

Question

For what value of k will the graph of 6x + ky = 6 be perpendiculuar to the graph of 2x – 6y = 12?  
1/2
4
2
5

bahrom7893 · Answer

perpendicular means the slope is negative inverse.

anonymous · Answer

yes i know

nubeer · Answer

wwhen u multiply the gradient of both equations it should be -1 
 tell me whatis the gradient of equation 1?

anonymous · Answer

so if you know, then all you need to do is find k so that the slope of the line 6x + ky = 6 has the slope you want....

anonymous · Answer

what is the slope you need?

anonymous · Answer

Solving both equations for y to put them into y=mx+b form might help make it easier to see.

anonymous · Answer

i need an equation with the slope of 3

anonymous · Answer

suggest you figure out k using @CliffSedge  suggestion....

anonymous · Answer

I think that k=2

anonymous · Answer

now check your answer... if you replace 2 with k, do you have a slope of 3 for that line?

anonymous · Answer

I have a slope of negative three...which I think id what I meant in the first place...considering the perpendicular slope to (1/3) is -3

anonymous · Answer

yes... you're correct.... :)

anonymous · Answer

nice work...