how do you find range? I need to find the range of f(x)=-5x^2-4, but I don't know exactly what range is.

Question

ranga · Answer

Domain is the values than 'x' can take.
Range is the values that f(x) can take.

If you graph the curve f(x) = -5x^2 - 4 you will find that f(x) cannot take ALL values but limited to certain values.  That will be your range.

anonymous · Answer

(-infinity, -4]

anonymous · Answer

thank you

ranga · Answer

I don't have a graphing calculator but that looks right.

But I usually write it as:    Range is:   -infinity < y <= -4

e.mccormick · Answer

@ranga Free graphing calculator: https://www.desmos.com/calculator/9rsvzfciqk @patcru1369 Please remember to close questions when you are done and it is always nice to give a medal to the best response.

ranga · Answer

Thanks @e.mccormick

e.mccormick · Answer

np.  have fun.

anonymous · Answer

sorry I forgot to close the question. >.<