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21 votes
Find the range of the function.

f(x) = 10-x²
a. [5,00)
c. (-∞0, 10]
b. (-∞, -1) U [0, 00)
d.
Please select the best answer from the choices provided
(-∞, -1) U [∞o, 10)

1 Answer

1 vote

Answer: hard to tell but I think D is correct (−∞,10], y ≤ 10

Explanation:

Range:

(−∞,10] or y

because there is a vertex at (0, 10)

(found this by using -b/2a giving us 0 for x coord and plugging in 0 to 10-x² giving us (0, 10)

Then understanding since -x² is negative, the parabola goes down. And we know that the range is anything less or equal to 10

User Benj
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