Answer:
standard form is f(x) = ax^2 + bx + c
sample equation: f(x) = 5x^2 + 10x + 5. a=5, b=10, c=5
Step-by-step explanation:
a, b, and c are real numbers in the standard form equation. if a>0 the parabola opens upwards, if a<0 parabola opens downwards
