Which is the graph of f(x) = 3x.

Step-by-step explanation:

The

x

-intercepts are

(

0

,

0

)

and

(

3

,

0

)

because

3

x

−

x

2

=

0

factored equals

(

x

)

(

x

−

3

)

=

0

When each of the parenthetical expressions is set equal to zero, you get

x

=

0

and

x

=

3

The vertex is

(

3

2

,

9

4

)

because the

x

-coordinate of the vertex is

x-coord. vertex

=

−

b

2

a

=

−

3

2

(

−

1

)

=

3

2

Then, you plug

3

2

into the equation for

x

and get

f

(

3

2

)

=

3

(

3

2

)

−

(

3

2

)

2

=

9

4

isi

step-by-step explanation:

use that smart brain

step-by-step explanation:

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