Answer :
Answer: -2
Step-by-step explanation:
My answer is better than the other guys
The good approximation for the value of the function, f(x), when x = 18 will be -2.
What is a system of equations?
A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.
Function is a type of relation, or rule, that maps one input to specific single output.
We need to find a good approximation for the value of the function, f(x), when x = 18.
The given function is
f(x) = -0.86x+13.5
Now putting x=18 in f(x), we get
f(x) = -0.86×18 + 13.5
f(x) = -15.48+13.5
f(x) = -1.98
f(x) = -2
The complete question is
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?
Learn more about equations here;
https://brainly.com/question/10413253
#SPJ2