A regression line is based on temperatures between 5 ∘C5\,^{\circ}\mathrm C5∘C and 22 ∘C22\,^{\circ}\mathrm C22∘C.
Compare the likely reliability of predictions at 18 ∘C18\,^{\circ}\mathrm C18∘C and 35 ∘C35\,^{\circ}\mathrm C35∘C.