5.3 Review

If f(x)= x+2, what does f(-3)=?

• 1

• -5

• -1

• 5

Answer explanation

Plug in -3 for every x you see. So x+2 becomes -3+2 which equals -1

:)

Tags

CCSS.HSF.IF.A.2

If f(x)= 2x-5, what does f(0) equal?

• 2

• -3

• 0

• -5

Answer explanation

2(0)-5

=0-5

=-5

Tags

CCSS.HSF.IF.A.2

If f(x)= 2x-5, what does f(2) equal?

• 4

• -1

• 2

• -5

Answer explanation

2(2)-5

=4-5

=-1

Tags

CCSS.HSF.IF.A.2

If f(x)= -3x+4, what does f(1) equal?

• 1

• 7

• -3

• 4

Answer explanation

-3(1)+4

=-3+4

=1

Tags

CCSS.HSF.IF.A.2

If f(x)= -3x+4, what does f(3) equal?

• 4

• -5

• 13

• -3

Answer explanation

-3(3)+4

=-9+4

=-5

Tags

CCSS.HSF.IF.A.2

If f(x)= (2/3)x+1, what does f(-3) equal?

• -2

• -1

• 1

• 2/3

Answer explanation

(2/3)(-3)+1

=-2+1

=-1

Tags

CCSS.HSF.IF.A.2

If f(x)=(2/3)x+1, what does f(6)=?

• 6

• 5

• 4

• -1

Answer explanation

(2/3)(6)+1

=4+1

=5

Tags

CCSS.HSF.IF.A.2

What does absolute value do?

• make x positive

• Make what's inside the absolute value bars positive

• Nothing

• Absolutely nothing

Answer explanation

So

l-12+3l

=+9

If f(x)=lx+3l, what does f(-4)=?

(absolute value of x+3)

• 1

• 4

• -1

• -4

Answer explanation

absolute value makes everything positive. So when the absolute value is holding a -1, it makes it a positive 1.

lx+3l

=l-4+3l

=l-1l

=1

Tags

CCSS.HSF.IF.A.2

If f(x)=lxl+3, what does f(-4)=?

(absolute value of x)

• 1

• -1

• 7

• -4

Answer explanation

absolute value of x makes the value inside to be positive. So a

l-4l+3

=4+3

=7

Tags

CCSS.HSF.IF.A.2