Write an equation in point-slope form of the line through point J(4, 1) with slope –4.

Question

aripotta · Answer

do you know what point-slope form is?

anonymous · Answer

yes

aripotta · Answer

so this should be easy. just substitute the numbers in

anonymous · Answer

how

anonymous · Answer

give u hard time

anonymous · Answer

sorry

anonymous · Answer

:(

aripotta · Answer

tell me what point-slope form is.

anonymous · Answer

tells a difference between two points on a line.

aripotta · Answer

what?

anonymous · Answer

The point-slope form expresses the fact that the difference in the y coordinate between two points on a line (that is, y − y1) is proportional to the difference in the x coordinate (that is, x − x1). The proportionality constant is m (the slope of the line).

aripotta · Answer

it's y - y1 = m(x - x1)

idk if that's what you meant...

aripotta · Answer

brb i gotta walk mah dog

anonymous · Answer

at night

anonymous · Answer

im at USA

aripotta · Answer

alright i'm back

aripotta · Answer

so it should be easy. you're just substituting the y in the coordinate for y1, the x in the coordinate for x1, and -4 for m

anonymous · Answer

so the answer is y - y1 = m(x - x1)

aripotta · Answer

no, you didn't substitute

aripotta · Answer

our point is (4,1) so x1 is 4 and y1 is 1

anonymous · Answer

y - y1 = m(x - x1)
y – 1 = (-4)(x – 4) 
y - 1 = -4(x - 4) 
y - 1 = -4x + 16 
y = -4x + 16 + 1 
y = -4x + 17

aripotta · Answer

which one is it then?

anonymous · Answer

y = -4x + 17

anonymous · Answer

STEp by STEp
y - y1 = m(x - x1)
y – 1 = (-4)(x – 4) 
y - 1 = -4(x - 4) 
y - 1 = -4x + 16 
y = -4x + 16 + 1 
y = -4x + 17

aripotta · Answer

i thought the answer was supposed to be in point-slope form

anonymous · Answer

so how can i write y = -4x + 17 to point-slope form

aripotta · Answer

lol. it was already in point-slope in step 1. y - 1 = -4(x - 4)

anonymous · Answer

haha never knew that