The vertex of a parabola is its highest or lowest point. Here, it is the lowest point, which happens right at the bottom of the U-shape—at (1, –4). Therefore, the answer is C.
Answer:
Step-by-step explanation:
1) Identify the problem and set a goal
2) choose a sample group for the survey
3) prepare for data collection
4) construct a questionnaire and collect responses from the sample group
5) analyze the data
6) draw a conclusion from your analysis
