Question

Find the direct variation equation of the graph through the points (0, 0) and (1, -2). Write in y=kx form.
Answer

y = 2x

y = -2x

y = 1/2 x

y = -1/2 x

Answer 1

here is an example of direct variation!
Example A:
If y varies directly as x, and y = 8 when x = 12, find k and write an equation that expresses this variation.
Plan of Attack:
Plug the given values into the equation y = kx.
Solve for k.
Then replace k with its value in the equation y = kx.
Step-by-Step:
Start with our standard equation: y = kx
Insert our known values: 8 = k*12
Divide both sides by 12 to find k: 8/12 = k
2/3 = k
Next: Go back to y = kx and replace k with 2/3.
y = (2/3)x

Answer 2

so just take this and plug in the points that ju have

Answer 3

so it would be y=-2x?

Answer 4

start from the beginning lol plug in the 1 for y and the -2 for x then start to solve for k

Answer 5

1=k(-2) then divide by -2 on both sides

Answer 6

1=k*(-2) divid it by -2 an k = -1/2

Answer 7

yesh then plug k in and there is ju answer! y=(-1/2)x

Answer 8

thanks :)

Answer 9

welcome! dang it seems like i know everything... but i dont lmao