Answer: it determines if the numbers are positive or negative
Step-by-step explanation:
x stays the same integer
k flips the sign
Answer:
y = a(x – h)2 + k, where (h, k) is the vertex. in y = ax2 + bx + c (that is, both a's have exactly the same value). The sign on "a" tells you whether the quadratic opens up or opens down.
