Let f(x) = ax^2. Pre-calc help??

Let f(x) = ax^2

a. Find a if the point (2,20) lies on the graph of f(x)

b. As x gets very large (positive), F(x) gets: (choose one)

i. Very large (pos)

ii. Very small (negative)

c. As x gets very small (neg), f(x) gets:

i. Very large (pos)

ii.Very small (neg)

Please give an explanation with your answer

Top 2 Answers

A few days ago

fcas80

Favorite Answer

a. 20=a(2^2)=4a, a=5

b. i.

c. i.

example y=1x^2. If x= 1 million, y= (1 million)^2

If x= -1 million, y= (-1 million)^2= (1 million)^2

A few days ago

Yorkshire Gurlie ♥

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