Question

Pre Calc: For what value of k will the graph of 6x + ky = 6 be perpendiculuar to the graph of 2x – 6y = 12?
A.1/2
B.)4
C.)2
D.)5

Answer 1

first...solve for y in terms of x in 2x - 6y = 12

do you know how?

Answer 2

@lgbasallote y=x/3-2 correct?

Answer 3

right

Answer 4

now...solve for y in terms of x in 6x + ky = 6

Answer 5

y=6/k-6x/k

Answer 6

@lgbasallote

Answer 7

right. so that has a slope of 6/k

for it to be perpendicular to y = x/3 - 2, the slope should be -3

agree?

Answer 8

@lgbasallote yessss

Answer 9

wait... i saw wrong

Answer 10

the slope of that equation is -6/k

Answer 11

so now.. equate -6/k to -3 and solve for k \[\huge -\frac 6k = -3\]

Answer 12

k=2 @lgbasallote thank you <3

Answer 13

welcome