Question

Help please, I don’t understand it.

Answer 1

`K=-2J+28`

Explanation:

For the given trend line, we need to find the y-intercept and slope of the line for determining its equation.

Equation of a line is of the form
`y=mx+b`

Where, 'm' is the slope and 'b' is the y-intercept.

Here, the variables are 'J' and 'K'.

The y-intercept is the point where the 'J' value is 0. From the graph, when 'J' is 0, then the 'K' value is 28. Therefore, the y-intercept is 28.

Slope is given as the ratio of change in 'K' and change in 'J'

The overall change in 'K' is 0 - 28 = -28.

The overall change in 'J' is 14 - 0 = 14

Therefore, the slope is given as:

`m=(\Delta K)/(\Delta J)=(-28)/(14)=-2`

Therefore, the equation of trend line is given as:

`K=-2J+28`