Question

Check my answer?

Write the equation of the line passing through point (2,-3) and is perpendicular to y=4x+7 in standard form.

I got 4x+y=-11; is it right?

Answer 1

no again...

Answer 2

slope of given line ?

Answer 3

4

Answer 4

yes, so slope of perpendicular line ?

Answer 5

4/1 ?

Answer 6

the product of slope of perpendicular lines = -1

Answer 7

so m1 * m2 = -1
m1 = 4, m2= ?

Answer 8

oh 4!

Answer 9

-4 my bad

Answer 10

no, slope of perpendicular line will be negative *reciprocal*

Answer 11

so m1*m2 = -1
4m2=-1
m2 = -1/4
ok ?

Answer 12

ohk sorry I'm not really good at this I just learned this

Answer 13

so now u have slope of required line and a point on it, which equation will u use ?

Answer 14

point-slope form?

y-y1=m(x-x1)

Answer 15

thats correct!
so what u get ?

Answer 16

y-(-3)=-1/4(x-2) ?

Answer 17

correct :)
now simplify....

Answer 18

y-(-3)=-1/4x - idk/: 0.5?

Answer 19

(-1/4)(-2) = +2/4 = +0.5

Answer 20

y-(-3) = y+3

Answer 21

oh wait..

y+3 = -1/4x - 0.5
then would you add -1/4x to the left side?
since I have to write it in standard form?
ax+by=c?

Answer 22

1) its y+3 = -1/4x + 0.5
2) yes., add 1/4 x , not -1/4 x

Answer 23

ohk so ..

1/4x+y+3=0.5
then add subtract 3 on both sides?

Answer 24

yes, correct

Answer 25

1/4x+y=2.5

Answer 26

0.5-3 = -2.5

Answer 27

or u could first multiply by 4 on both sides

Answer 28

oh yeah.. sorry.. and oh ohk if i did that it would be x+y=2

Answer 29

let me show you steps:
y+3 = -1/4x + 0.5
y+1/4 x +3= 0.5
multiplying 4 on both sides
4y+ x + 12 = 2
now can u solve ahead

Answer 30

4y+x=14

Answer 31

2-12=?

Answer 32

oh whoops -10

Answer 33

you will subtract 12 from both sides, right ?

Answer 34

yes, sorry

Answer 35

so finally, 4y+x=-10

Answer 36

yeah thank you though! (:

Answer 37

welcome ^_^