Question

find the mathematical model for the following statement. remember to use k as the constant of proportionality. i varies directly as the product of r and t

Explanation:

Step1: Recall direct - variation formula

If $y$ varies directly as $x$, the formula is $y = kx$. Here, $I$ varies directly as the product of $r$ and $t$.
$I=k\times r\times t$

Step2: Write the final model

The mathematical model is $I = krt$.

Answer:

$I = krt$