Question

Direct Variation Help!! MEDAL AND FAN!

Answer 1

I can assume you know what a direct variation is, right? or do you want to know the (basic) definition?

Answer 2

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Answer 3

I need to know how to find the constant of variation and write the equaiton. there is a table of numbers as well if you need to see that http://prntscr.com/5gjrnn

Answer 4

okay, a direct variation is.
\(\large\color{black}{ y=kx }\) (where k is a constant - a number, not a variable).
A couple of examples of a direct variation where you are given the k, are:
\(\large\color{blue}{ y=-2x }\) (k=-2)
\(\large\color{red}{ y=4x }\) (k=4)
\(\large\color{blue}{ y=3x }\) (k=3)
\(\large\color{red}{ y=x }\) (k=1)
\(\large\color{blue}{ y=-x }\) (k=-1)

Answer 5

it is basically a normal line with a y-intercept at the origin, at point (0,0).

Answer 6

Now, what relatation, pattern do you see between the x and the y?

Answer 7

I don't know..

Answer 8

I mean, each time,
1) when x=-2, what do you do to get -4 for y?
2) when x=-4, what do you do to get -8 for y?
3) when x=-8, what do you do to get -16 for y?

can you tell me? take your time to think if you need.

Answer 9

They're increasing by 2 or times 2

Answer 10

I mean,
the x-values in the table are decreasing by 2.
but to obtain any Y term what do you do to X? (add, multiply, subtract divide), what do you do to the x?

Answer 11

I forgot.