2 multiple choice questions? FRESHMAN! 10 points!?

1. For the graph below, what should the domain be so that the function is at least 200?

graph of y equals minus 2 times the square of x plus 30 times x plus 200

A) -5 ≤ x ≤ 20

B) 0 ≤ x ≤ 15

C) x ≥ 0

D) all real numbers.


2.A biologist created the following graph to show the relationship between the temperature of water (x), in degrees Celsius, and the number of insect larvae (y) in the water:

graph of y equals minus 2 times the square of x plus 20 times x plus 400

What does the y-intercept of the graph represent?

A) There were 400 larvae at 0 degree Celsius.

B) There were no larvae at 400 degrees Celsius.

C) The original number of larvae in the water was 400.

D) The original temperature of the water was 400 degrees Celsius.


Thank you!