Answer:
Dan is correct
Step-by-step explanation:
First, I calculated the amount of hours that the graph shows in total, coming up with a total of 3,085 hours. I do this by multiplying the number of adults surveyed by the number of hours they spent. So for the first column, (80+70)*1, second column, (90+80)*2, third column, (135+130)*3, fourth column, (140+135)*4, and fifth column, (65+75)*5 if you get what I mean. Then I add up all values. Knowing that there were two sets of 500 American adults interviewed already, I came to the conclusion that 1,000 total adults were surveyed. Finally, I divided the total number of hours(3,085) by the total number of adults interviewed (1,000) to get a mean of 3.085 hours, rounding it to 3 hours and proving that Dan is correct.
Answer:
Step-by-step explanation:
From the picture attached,
Graph (A)
Domain of the function : (-∞, ∞) or a set of real numbers
Range of the function : (-∞, ∞) or a set of real numbers
Graph (B),
Domain : (-∞, ∞) Or a set of real numbers
Range : (-∞, 6] Or x ≤ 6
Graph (C),
Domain : [-2, ∞) or x ≥ -2
Range : (-∞, ∞) Or a set of real numbers
Therefore, Graphs (A), (B) have the domain of all real numbers and Graph (C) has the range of all real numbers.
Since all the parabolas are not the functions,
Therefore, Graph (C) is not a function. Graphs (A) and (B) are the functions.
