Answer:
-142
Step-by-step explanation:
So we have the function:
To find f(9), substitute x for 9:
Square the first term and multiply the second:
Add:
And that's our answer :)
-9-(-12)=-9+12=3
-9-12=-9+(-12)=-21
Well, in order to first determine the slope or y-intercept, you must put change the equation to this format: y=mx+b.
m=slope and b=y-interceptI
in order to do that, you must change this equation.
x+3y=9
-x -x
----------
3y=9-x
Then, rewrite it as:
3y=-x+9
_______
3 3
simplify to
y=-x/3 +9