Answer:
The third answer (C).
Step-by-step explanation:
This graph starts at 10. So it needs the +10 at the end.
Also the slope is -1/2 because the graph goes down one, right two. Rise/run.
x^2 -2x = 4x+1
2x^2 +12x = 0
9x^2 +6x -3=0
A quadratic equation has the highest power of x being squared
These are all quadratic equations