Question

a model predicts that a population grows by 125 people per year, starting at 1,000. after 3 years, the actual population is 1,330.
is the model valid for this time period?

the prediction was higher than the actual
the prediction was lower than the actual
there is not enough information

Explanation:

Step1: Calculate predicted population

The model starts at 1000 and grows by 125 per year. After 3 years, predicted population is \(1000 + 125\times3\).
\(125\times3 = 375\), so \(1000 + 375 = 1375\).

Step2: Compare predicted and actual

Actual population is 1330. Since \(1375>1330\), the prediction is higher than actual.

Answer:

The prediction was higher than the actual