Answer:
B. Stratified random sample is the correct answer
Yes you did the equation on this page correctly.
You didn't put your label and also the answer would be 299 36+36+68+68+91=299
Domain: [-4, ∞)
Range: (-∞, 0]
*Domain are all x-values listed. Here you can see the graph going the right (positive) of -4 (Doesn't go to the left)
*Range are all y-values listed. Here you can see the graph starts from zero and goes down (negative)
Hope it helps!