Question

through (3,-4); perpendicular to x+5y=-5

Answer 1

what?

Answer 2

i think we have to write the equation of the line that goes through point (3,-4) and is perpendicular to x + 5y = -5

Answer 3

yeah, i need help solving it

Answer 4

what form does it need to be in?

Answer 5

standard?

Answer 6

function notation

Answer 7

idk what that is :l is that like slope-intercept?

Answer 8

its like f(x)= mx+b

Answer 9

hmm ok. well first i would make x+5y=-5 into slope-intercept so we can see what the slope is

Answer 10

do you know how to do that?

Answer 11

yes

Answer 12

so what did you get when you put it into slope-intercept form?

Answer 13

y=1/5x-1

Answer 14

yes, but 1/5x needs to be negative.

so what's going to be the slope of our perpendicular line?

Answer 15

perpendicular lines have negative reciprocal slopes of each other

Answer 16

so if the slope of our first line is -1/5 what's the slope of our perpendicular line?