Use a graphing utility to graph the function and then answer the question.
-The polynomial function $I ( t ) = - 0.1 t ^ { 2 } + 1.3 t$ represents the yearly income (or loss) from a real estate investment, where t is time in years. After what year does income begin to decline?
A) 13
B) 5.5
C) 8.67
D) 6.5

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The Answer of Use a graphing utility to graph the function and then answer the question.
-The polynomial function $I ( t ) = - 0.1 t ^ { 2 } + 1.3 t$ represents the yearly income (or loss) from a real estate investment, where t is time in years. After what year does income begin to decline?
A) 13
B) 5.5
C) 8.67
D) 6.5

Use a Graphing Utility to Graph the Function and Then I(t)=−0.1t2+1.3tI ( t ) = - 0.1 t ^ { 2 } + 1.3 tI(t)=−0.1t2+1.3t

Use a Graphing Utility to Graph the Function and Then $I ( t ) = - 0.1 t ^ { 2 } + 1.3 t$