They are functions because they have the variables
1. the last one
2.the first one hope this helps.
The answer is (1,-4)
Remember that the vertex is the center of the parabola.
Answer:
(-3, ∞)
Step-by-step explanation:
Since this is an upward opening parabola, it will expand as it approaches infinity, so the first and second answers are wrong.
We can tell by the graph that the y value of the vertex is at -3, so that means the answer can't be the fourth one.
Therefore, the answer is (-3, ∞)
