Answer
$P(t)=6.591\cdot\ln(t)-17.69$
Work Step by Step
Using desmos.com's calculator,
enter the table in two columns $t_{1}$ and $P_{1}$.
Then enter "$P_{1}=A\times\ln(t_{1})+C$ ".
Read the values for A and C.
$P(t)=6.591\times\ln(t)-17.69$