Question

21. Write an equation of a line whose graph is parallel to the graph of y = 3x – 10.

Answer 1

well,you know when a line is parallel to another line , their slopes are equal to each other?

Answer 2

yes

Answer 3

ok,so the slope of the first one is "3" so the equation is:
y = 3x + b

Answer 4

but we don't have b,
okay?

Answer 5

so my answer of y=3x + 5 would be correct for the question?

Answer 6

why 5?

Answer 7

how did you find b=5?

Answer 8

i am assuming right now not sure

Answer 9

ok,the question just gave you slope,and didn't give you any point,so we can't find y-intercept...

Answer 10

then

Answer 11

@Yttrium how do i solve this one

Answer 12

you mean another question?

Answer 13

multiply the equation with any constant and you'll get a parallel line.

Answer 14

You already know the slope, right? Therefore, you can substitute any point that do not touch the given equation.

Answer 15

example ?@Yttrium

Answer 16

(0,0) then substitute it to the form y-y1 = m (x-x1) where your m=3

Answer 17

parallel lines have equal slopes, this means that we know that the slope of the unknown parallel line is..? :D

Answer 18

If you "don't use formula" it is better,or if you want to use formula "you need to know its proof"

Answer 19

please don't use any formula without any knowledge of its proof :)

Answer 20

for example you can solve @Yttrium 's question like this:
y = m(x) + b
and you know the slope,y and x so you can find b simply :)

Answer 21

ok wait let me solve it

Answer 22

0 = 3(0) + b
0 = 0 + b
0 = b

Answer 23

is it like that

Answer 24

correct :)

Answer 25

let me try my equation if i get it right

Answer 26

nah failed could not get any

Answer 27

@Yttrium give me 1 so that i answer it there

Answer 28

@Yacoub1993, you already had an answer. Since you've got b=0. Therefore, y=3x+ or simply y=3x is another equation with slope of 3. :)

Answer 29

ok thnxs