For which interval(s) is the function increasing and decreasing? y=2(x-4)2+3

Question

Here are my choices for answers.  I'm just drawing a complete blank. Thanks

 

increasing for x > 3; decreasing for x < 3increasing for x > 8; decreasing for x < 8increasing for x > 2; decreasing for x < 2increasing for x > 4; decreasing for x < 4

Answer 1

The parabola has a vertex at (4,3) and because the coefficient is positive it’s a U-shaped parabola, which makes it decreasing left of the vertex and increasing on the right. 4th answer choice is the correct one.