FUNCTION AND RELATION

Which table represents 𝒚 as a function of 𝒙?

• A

• B

• Both are functions

• Neither is a function

Which table represents 𝒚 as a function of 𝒙?

• A

• B

• Both are functions

• Neither is a function

Is the relation a function?

• YES! For every 𝒙 there is only one 𝒚.

• YES! For every 𝒚 there is only one 𝒙.

• NO! This relation is not a function.

Is the relation a function?

• YES! This relation passes the vertical line test.

• YES! This relation passes the vertical line test.

• NO! This relation passes the vertical line test.

• NO! This relation fails the vertical line test.

True or False? The relation is a function.

• True

• False

True or False? The relation is a function.

• True

• False

True or False? The relation is a function.

• True

• False

Evaluate  $f(x)=10x^2+6x-4$   if  $x=5$  .

• 376

• 276

• 280

Evaluate  $f(x)=x^2-9$  if  $x=12$  .

• 135

• 134

• 133

Evaluate  $f(x)=2x^2-12x+23$  if  $x=3$  .

• 25

• 45

• 5