or
Step-by-step explanation:
No need for a calculator.
Assuming that the equation is in the form , we can plug in points to get our equation. For ease, let's use (1,18) and (2,21). When plugging these points in, we get . Now let's divide the equations to get rid of : . Now that we have , we can plug in the value we just calculated to solve for : , and solving for , we get .
So the
This equation in decimal form (rounded to the nearest thousandth) is .
hope this helped! :)