a line of best fit is $f(x)approx - 0.86x + 13.5$ for the set of points in the table.\n| $x$ | $f(x)$ |\n|…

a line of best fit is $f(x)approx - 0.86x + 13.5$ for the set of points in the table.\n| $x$ | $f(x)$ |\n| ---- | ---- |\n| 2 | 12 |\n| 3 | 10 |\n| 5 | 10 |\n| 6 | 8 |\n| 7 | 9 |\n| 8 | 5 |\n| 9 | 6 |\nusing the equation for the line of best fit, what is a good approximation for the value of the function, $f(x)$, when $x = 18$?\n-5\n-2\n3\n12

a line of best fit is $f(x)approx - 0.86x + 13.5$ for the set of points in the table.\n| $x$ | $f(x)$ |\n| ---- | ---- |\n| 2 | 12 |\n| 3 | 10 |\n| 5 | 10 |\n| 6 | 8 |\n| 7 | 9 |\n| 8 | 5 |\n| 9 | 6 |\nusing the equation for the line of best fit, what is a good approximation for the value of the function, $f(x)$, when $x = 18$?\n-5\n-2\n3\n12

Answer

Explanation:

Step1: Substitute x value

Substitute $x = 18$ into $f(x)=- 0.86x + 13.5$. $f(18)=-0.86\times18 + 13.5$

Step2: Calculate multiplication

Calculate $-0.86\times18=-15.48$. $f(18)=-15.48 + 13.5$

Step3: Calculate addition

Calculate $-15.48+13.5=-1.98\approx - 2$.

Answer:

-2