Question

The slope is -2 and the line passes through (4,-5). what is the equation?

Answer 1

y=-2x+3

Answer 2

Not really. These things are the hardest for me.

Answer 3

do you know how to do that?

Answer 4

first you have to identify this as a direct line,
in general we write it as y=mx+c
where m is the slope and c is the intercept.
m=-2 is given.apply the point (4,-5) which will give you the c.

Answer 5

y=-2x+3 where do the 4 and -5 go?

Answer 6

since you know the slope (m=-2) apply it,
y=-2x+c
to get the c apply (4,-5),that is x=4 and y=-5

Answer 7

Oh. Ok.

Answer 8

:-)

Answer 9

Wait, im confused.

Answer 10

so that would be -5=-2(4)+c ??

Answer 11

yes

Answer 12

how do you get that to y=2x+3 ?

Answer 13

-5=-2(4)+c
solve this you yeild c=3
so now you have everything for your direct line,
y=-2x+3

Answer 14

so my next problem is Slope= 2/5 and line passes through (2,1/2)

Answer 15

so -1/2=2/5(2)+c ??

Answer 16

same as above,yes you are correct but y should be 1/2.

Answer 17

sorry i wrote it wrong. (2,-1/2)

Answer 18

then you applied it correctly :-)

Answer 19

now im just confused with solving. especially with fractions

Answer 20

why don't you use a calculator?

Answer 21

-13/10
?