Answer the question about the given function.
-Given the function $f ( x ) = - 5 x ^ { 2 } + 10 x - 1$, if $x = 1$, what is $f ( x )$ ? What point is on the graph of $f$ ?
A) $4 ; ( 1,4 )$
B) $4 ; ( 4,1 )$
C) $- 16 ; ( - 16,1 )$
D) $- 16 ; ( 1 , - 16 )$

Question

Quizplus · Accepted Answer

Substituting $x = 1$ into the function $f(x) = -5x^2 + 10x - 1$ gives $f(1) = -5(1)^2 + 10(1) - 1 = 4$, so the point on the graph is $(1, 4)$.

Answer the Question About the Given Function f(x)=−5x2+10x−1f ( x ) = - 5 x ^ { 2 } + 10 x - 1f(x)=−5x2+10x−1

Answer the Question About the Given Function $f ( x ) = - 5 x ^ { 2 } + 10 x - 1$