Which inequality in vertex form represents the region less than or equal to the quadratic function with vertex open paren negative 6 comma 12 close paren and includes the point open paren negative 9 comma 15 close paren on the boundary?
Answer
A
y is less than or equal to 1 third times open paren x minus 6 close paren squared plus 12
B
y is less than or equal to 3 times open paren x plus 6 close paren squared plus 12
C
y is less than or equal to 1 third times open paren x plus 6 close paren squared plus 12
D
y is less than or equal to 3 times open paren x minus 6 close paren squared plus 12