Question

Help me plz I don't understand this

Answer 1

D.
`y = 2x`

Explanation:

A proportional relationship is represented by the formula
`y = mx + b`.

m = the slope, which is
`(y_(2)-y_(1) )/(x_(2) - x_(1))`.

b = the y-intercept, the point where the line crosses the y-axis. We actually don't have to worry about the
`+ b` part of the formula because
`b = 0`, so it can be left out.

To find the slope, use
`(y_(2)-y_(1) )/(x_(2) - x_(1))`. Subtract the smaller y value (2) from the larger y value (6).

(6 - 2 = 4)

Then subtract the smaller x value (1) from the larger x value (3).

(3 - 1 = 2)

So it looks something like this now:

`(6-2)/(3-1)` , which equals
`(4)/(2)`

Then you divide the top part of the fraction (4) by the bottom part. (2).

`(4)/(2)` = 2. The slope (m) is 2.

So the final equation is
`y=2x`.