Moderate# Estimating Minnow Population By Linear Approximation

SVCALC-JHWBIW

The number of minnows in a pond was recorded every $2$ months for a period of $8$ months. During month $2$ there were $42$ minnows, in month $4$ there were $53$, in month $6$ there were $62$, and in month $8$ there were $74$ minnows.

Use linear approximation at $t=8$ to estimate the number of minnows that were in the pond in month $9$.