Question

Choose the equation of the line passing through the point (1, -5) and perpendicular to y = onefifth x - 10
a. y = 5x + 10
b. y = 5x
c. y = -5x - 10
d. y = -5x

Answer 1

i need help on how to figure this out on my own. i have a dozen other ones like this

Answer 2

the product of slopes of perpendicular lines =-1

y=(1/5)x-10
so the slope of perpendicular line : -5
y-y1=m(x-x1)
y+5=-5(x-1)
y+5=-5x+5
y=-5x+5-5
y=-5x

Answer 3

the answer is D.

Answer 4

And if its a parallel line?

Answer 5

has same slope.

Answer 6

thank you so much

Answer 7

welcome ^__^.