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| 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 |\n-5\n-2\n3

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| 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 |\n-5\n-2\n3

Answer

Explanation:

Step1: Substitute x=18 into f(x)

$f(18) = -0.86 \times 18 + 13.5$

Step2: Calculate -0.86×18

$-0.86 \times 18 = -15.48$

Step3: Add 13.5 to result

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

Answer:

B. -2