Question

Which of the following parabolas would open downwards?(1 point)
Responses

y=(x−5)2−4

y is equal to open paren x minus 5 close paren squared minus 4

y=8(x−1)2+2

y is equal to 8 times open paren x minus 1 close paren squared plus 2

y=−3(x+4)2+9

y is equal to negative 3 times open paren x plus 4 close paren squared plus 9

y=4(x+6)2−3

Answer 1

A parabola y = a(x − h)^2 + k opens downward only if a < 0. Here only y = −3(x + 4)^2 + 9 has a negative coefficient, so it opens downward.