Question

What is the equation of the line in slope-intercept form? the line perpendicular to

y = 1/3x + 5 through (2, 1)

CHOICES
A. y = -1/3x + 7

B. y = 3x + 7

C. y = 1/3x + 7

D. y = -3x + 7

Answer 1

Can you tell me what the standard eq for slope-intercept is?

Answer 2

y=mx+b

Answer 3

what does the m represent?

Answer 4

slope

Answer 5

good, now what is the starting slope?

Answer 6

thats where i'm confused!

Answer 7

ok, so we are given \(y=\frac{1}{3} x+5\) correct?

Answer 8

yes

Answer 9

what is your m=? just look at the positioning

Answer 10

1/3?

Answer 11

right!

Answer 12

so now, 1/3 is your slope, do you see why?

Answer 13

The slope of the line is -3.

Answer 14

yes

Answer 15

ok so now, what do you know about the difference between the slope of perpendicular lines?

Answer 16

no

Answer 17

read this please: http://www.purplemath.com/modules/slope2.htm

Answer 18

jsyk, 'no' is not an answer to a what question either.

Answer 19

oops I completely read your question wrong, sorry.

Answer 20

it's cool, just read over that site real quick

Answer 21

I did yet again it still doesn't make sense to me.

Answer 22

ok so, can you pinpoint where on the page you did not understand?

Answer 23

This may be a better explanation https://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/more-analytic-geometry/v/perpendicular-line-slope