Determine whether the graph of y = 3x^2 + 2x − 10 opens up or down and whether it has a maximum or minimum point.

Up; Minimum

Up; Maximum

Down; Minimum

Down; Maximum

Question

Determine whether the graph of y = 3x^2 + 2x − 10 opens up or down and whether it has a maximum or minimum point.


Up; Minimum

 Up; Maximum

 Down; Minimum

 Down; Maximum

anonymous · Answer

someone just asked this ..

here was my ans

Easiest if you graph it.

it opens up bc  coefft of x^2 is positive 
And has a min. Differentiate, get slope, see where slope = 0.

anonymous · Answer

Thank You! Can you help me some more please :)

slaaibak · Answer

Standard from: y = ax^2 + bx + c

Now, the a will tell you everything.  When the a is negative, it will go down.  Therefore, it has  a maximum.

if a is positive, it will go up. Therefore it has a minimum

anonymous · Answer

okay thanks. can you help me some more :)

anonymous · Answer

http://openstudy.com/study#/updates/502539a7e4b0d38989b738c5

anonymous · Answer

graph it on yr phone - youll see it opens up. and maybe  also plot some points