#y=-3x^2+8x+35#? Determine whether the parabola opens up or down; explain your conclusion.

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Answer 1 · 2018-03-22T19:52:40

down

the #3x^2#is negative so its down.

Answer 2 · 2018-03-22T19:54:12

The parabola will open downward because #a<0#.

#y=-3x^2+8x+35# is a quadratic equation in standard form:

#y=ax^2+bx+c#,

where:

#a=-3#, #b=8#, #c=35#

The parabola will open downward because #a<0#.

graph{y=-3x^2+8x+35 [-10, 10, -5, 5]}