Determine the Open Intervals on Which the Graph Of $f ( x ) = 2 x ^ { 2 } + 5 x - 4$

question 43

Multiple Choice

Determine the open intervals on which the graph of $f ( x ) = 2 x ^ { 2 } + 5 x - 4$ is concave downward or concave upward.

• A)concave upward on \(( - \infty , 0 )\) ; concave downward on \(( 0 , \infty )\)
• B)concave downward on \(( - \infty , \infty )\)
• C)concave upward on \(( - \infty , \infty )\)
• D)concave downward on \(( - \infty , 0 )\) ; concave upward on \(( 0 , \infty )\)
• E)concave upward on \(( - \infty , 1 )\) ; concave downward on \(( 1 , \infty )\)

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