Question

HELP PLEASE!! if the slope of a line through the origin and (-2, b) is 2, and the line through (b, -2) and (a, 5) is parallel to that line, what is the value of a?

Answer 1

do you understand what you have?

Answer 2

@nincompoop i dont really know how to start the problem

Answer 3

do you know the slope-intercept form of a line?

Answer 4

@nincompoop yes y2-y1over x2-x1

Answer 5

NO

Answer 6

that is the formula to solve for the slope given two points
but you were given the slope already, it says 2

Answer 7

oh wait y=mx+b? @nincompoop

Answer 8

yes

Answer 9

do you know that equation's parts?

Answer 10

so use plug in the y-value into the equation?

Answer 11

do you have the y value?

Answer 12

well in the question it just says the line through (b, -2) and (a, 5) are parallel to the line that goes through the origin and (-2, b).....just look at the original problem if that sounded confusing

Answer 13

@nincompoop

Answer 14

I am not confused

Answer 15

so how would you plug in the values?

Answer 16

would i use point slope formula? @nincompoop

Answer 17

try if it works

Answer 18

@nincompoop it didnt work for me lol or maybe im doing something wrong

Answer 19

@KinzaN could you help me please?

Answer 20

Okay, so you're given two points on a line and its slope:
"through the origin" = (0, 0) and point (-2, b), with slope (m) = 2

Using this information, you can find "b."

(0, 0) -> (x1, y1)
(-2, b) -> (x2, y2)
m = 2

Answer 21

Using this value of "b" which you should be able to solve, repeat the process for the second set of data:

(b, -2) -> (x1, y1)
(a, 5) -> (x2, y2)
Is this line is "parallel," its slope is the same: m = 2.

Answer 22

Et j'ai fini.

Answer 23

remember that y-intercept is when x = 0
(0, y)
and x-intercept is when
y = 0
(x, 0)

Answer 24

"i am not confused" i love nin