Interpolation — Grade 8 Math, what it means and where it is taught
Predicting inside the range of the data. Usually safe.
Taught in Grade 8 Math.
Where it is taught
What it rests on
Work through these first if this one does not settle.
- Range — The set of outputs that actually occur.
Practise this idea
1 question in the course bank use Interpolation, in Lines of Best Fit.
Problem 1
Data covers x from 2 to 15. Predicting at x = 80 is
- extrapolation, and unsafe
- interpolation, and safe
- impossible to compute
- the same as the mean
Worked answer
extrapolation, and unsafe
80 is far outside 2 to 15
That is extrapolation
The pattern may not continue