1. c
2. c again hope this helps and plz mark as brainliest
In form f(x)=ax^2+bx+c
the axis of symmetry is -b/2a so
3/2=-b/2a
given
f(x)=3x^2+bx+4
a=3
b=b
-b/(2*3)=3/2
-b/6=3/2
-b=18/2
-b=9
b=-9
The slope of the best fit for the 3 given points is 500, so the correct option is b.
<h3>
How to find the slope?</h3>
Remember that for a line that passes through two points (x₁, y₁) and (x₂, y₂) the slope is:
With the 3 given points we can find 3 slopes, and then we will need to find the average of these 3.
The 3 points are: (3, 2,750), (6, 4,200), and (9,5,750)
Then the 3 slopes are:
The average slope is:
So the correct option is b.
If you want to learn more about slopes:
brainly.com/question/1884491
#SPJ1
Using the sum of interior angles equation;
(n-2)180=sum
(n-2)180=2340
n-2=2340/180
n-2=13.5
n=13.5+2
n=15.5
However, the problem is that a polygon cannot have "half" as side. Therefore, there might be a problem in the question or there is no solution to such a question.
Hope I helped :)