The domain of a quadratic function is all real numbers and the range is y ≤ 2. How many x-intercepts does the function have?
1 answer:
<h3>Answer: 2</h3>
Explanation:
The range is y ≤ 2 which means that y = 2 is the largest y can get. The parabola opens downward to form a sort of "frowny face" so to speak. When moving down the parabola, we'll cross the x axis at two different spots. An example of this is shown below with the equation y = -x^2+2.
There's no connection between the '2' in y ≤ 2 and the final answer of 2 roots. We could easily have a range of something like y ≤ 5 or y ≤ 8 and the answer will still remain as 2. The most roots a parabola can have is 2.
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Further explanation:
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So the new function will be:
Keywords: Population growth, Population growth function
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