a line of best fit is f(x)= - 0.86x + 13.5 for the set of points in the table. using the equation for the…

a line of best fit is f(x)= - 0.86x + 13.5 for the set of points in the table. using 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\begin{tabular}{|c|c|}hline$x$&$f(x)$\\hline2&12\\hline3&10\\hline5&10\\hline6&8\\hline7&9\\hline8&5\\hline9&6\\hlineend{tabular}\n-5\\\n-2\\\n3\\\n12

a line of best fit is f(x)= - 0.86x + 13.5 for the set of points in the table. using 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\begin{tabular}{|c|c|}hline$x$&$f(x)$\\hline2&12\\hline3&10\\hline5&10\\hline6&8\\hline7&9\\hline8&5\\hline9&6\\hlineend{tabular}\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

$f(18)=-1.98\approx - 2$

Answer:

-2