Question

Which answer is the best estimate of the residual value when x = 5? −1.5 −0.5 0.5 1.5

Answer 1

I took the test, (for this particular graph) it was -1.5.

Answer 2

The correct option is 1.

Explanation:

The formula for residual value is

`\text{Residual Value = Observed Value - Estimated value}`

In the given graph points represents the observed value and the line represents the expected or estimated value.

From the given graph it is clear that the observed value at x=5 is 5.5 and the estimated value at x=5 is 7.

`\text{Residual Value}=5.5-7`

`\text{Residual Value}=-1.5`

The residual value is -1.5, therefore the correct option is 1.