QuestionPredict diamond production using $f(x)=-3.09 x+148.37$ for 2026, where $x$ is years after 2017. Result: \$ \square billion.

Studdy Solution
Calculate the value of $f(9)$.
$$f(9) = -3.09 \times9 +148.37 =120.48$$The diamond production in2026 is predicted to be $120.48$ billion.