I need a graph that represents the function y= -2x^2 - 5. Been stuck on this for quite a while..

Question

campbell_st · Answer

well what do you need to know... 

vertex, concavity, x intercepts...?

anonymous · Answer

Its graphing quadratic functions

campbell_st · Answer

I know what it is.... I asked, what you would like to know... there are numerous ways to graph it..

1. table of values, 

2. using calculus

3. using some facts about know graphs... then adjusting...

anonymous · Answer

Just graphing it would be great.

campbell_st · Answer

ok.... well using a table of values, substitute each x value into the equation to get the corresponding y value. Plot the points on the number plane and you'll see your curve


try     x: -4  -3   -2    -1   0   1   2    3   4
        ------------------------------- 
        y

anonymous · Answer

.. Can you help me with that pretty please ill be your best friend

campbell_st · Answer

ok... so what's               -2*(-4)^2 - 5 = ?

repreat the process for each value of x