Let c be any constant number. Which of the following will always be perpendicular to -4x + y = -2?

Question

ujjwal · Answer

and the following are?

anonymous · Answer

Y=1/4X+C
Y=4X+C
Y=-4X+C
Y=-1/4X+C

ujjwal · Answer

can you find slope of lines? the product of slopes of two lines perpendicular to each other is -1

anonymous · Answer

I DONT KNOW HOW TO FIND SLOPE

ujjwal · Answer

slope is also called gradient. do you know how to find gradient?

anonymous · Answer

no

ujjwal · Answer

In a line Ax+By+c=0
slope=-B/A
can you do it now? just try. you can do it.
find slopes.
the product of slopes of two lines perpendicular to each other is -1

anonymous · Answer

i got y=4x+c  is this right?

ujjwal · Answer

oops! i made a mistake! typo.
slope=-A/B
Now do it.

anonymous · Answer

so i got y=-4x=C is this right?

ujjwal · Answer

what is the slope of given line?

anonymous · Answer

4?

ujjwal · Answer

yep.
now let, slope of anothe line perpendicular to it be x
therefore, 4x=-1
or, x=-1/4
so, the line which has the slope -1/4 is your answer.

anonymous · Answer

ohh okay thank you

ujjwal · Answer

the correct answer is y=-1/4x+c