Read the sentence. Few people settled on the plateau, which is an elevated area of relatively flat land.

What type of context clue helps describe the meaning of the underlined term?

inference
restatement
antonym or synonym
definition or explanation

You're asking in the ap section, so i'll give the ap calculus-style answer. alternatively, you can find the vertex of the parabola and use the "y"-coordinate as the answer.

the maximum height can occur at a critical number, that is, a number  such that  .

the derivative of  can be calculated as follows:



find a value of  that is a zero of the derivative:


this is parabola that is opening downward; we can assume there is a maximum at  .

to find that maximum, calculate  .