Answer
$11^{o}C, \qquad 19.5^{o}C$
Work Step by Step
The point with coordinates (160,10) is positioned just below the curve representing $12^{o}C$, about a quarter of the way down towards the curve $8^{o}C$. Estimate: $11^{o}C$
The point (180, 5) is slightly below, almost on the curve representing $20^{o}C$. Estimate: $19.5^{o}C$
