nagdy1
Write an equation in point-slope form of the line through point J(4, 1) with slope –4.
Delete
Share
This Question is Closed
AriPotta
Best Response
You've already chosen the best response.
0
do you know what point-slope form is?
nagdy1
Best Response
You've already chosen the best response.
0
yes
AriPotta
Best Response
You've already chosen the best response.
0
so this should be easy. just substitute the numbers in
nagdy1
Best Response
You've already chosen the best response.
0
how
nagdy1
Best Response
You've already chosen the best response.
0
give u hard time
nagdy1
Best Response
You've already chosen the best response.
0
sorry
nagdy1
Best Response
You've already chosen the best response.
0
:(
AriPotta
Best Response
You've already chosen the best response.
0
tell me what point-slope form is.
nagdy1
Best Response
You've already chosen the best response.
0
tells a difference between two points on a line.
AriPotta
Best Response
You've already chosen the best response.
0
what?
nagdy1
Best Response
You've already chosen the best response.
0
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
Best Response
You've already chosen the best response.
0
it's y - y1 = m(x - x1)
idk if that's what you meant...
AriPotta
Best Response
You've already chosen the best response.
0
brb i gotta walk mah dog
nagdy1
Best Response
You've already chosen the best response.
0
at night
nagdy1
Best Response
You've already chosen the best response.
0
im at USA
AriPotta
Best Response
You've already chosen the best response.
0
alright i'm back
AriPotta
Best Response
You've already chosen the best response.
0
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
nagdy1
Best Response
You've already chosen the best response.
0
so the answer is y - y1 = m(x - x1)
AriPotta
Best Response
You've already chosen the best response.
0
no, you didn't substitute
AriPotta
Best Response
You've already chosen the best response.
0
our point is (4,1) so x1 is 4 and y1 is 1
nagdy1
Best Response
You've already chosen the best response.
0
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
Best Response
You've already chosen the best response.
0
which one is it then?
nagdy1
Best Response
You've already chosen the best response.
0
y = -4x + 17
nagdy1
Best Response
You've already chosen the best response.
0
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
Best Response
You've already chosen the best response.
0
i thought the answer was supposed to be in point-slope form
nagdy1
Best Response
You've already chosen the best response.
0
so how can i write y = -4x + 17 to point-slope form
AriPotta
Best Response
You've already chosen the best response.
0
lol. it was already in point-slope in step 1. y - 1 = -4(x - 4)
nagdy1
Best Response
You've already chosen the best response.
0
haha never knew that