Question

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

A -5 less or equal to x less than or equal to 29
B 0 less than or equal to x less than or equal to 15
C x is greater then or equal to 0
D All real numbers

Answer 1

Answer: (b)

Explanation:

A downward parabola graph is given such that it cuts the Y-axis at (0,200)

and x-axis at (5,0) and (20,0)

For the value to be at least 200, the value of x lies between 0 to 15 as the value of y is greater than 200.

`0\leq x\leq 15`

So, the correct option is (b)