gabbydalcinor gabbydalcinor
  • 24-04-2020
  • Mathematics
contestada

Help the selection choice is up or down

Help the selection choice is up or down class=

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redqueen4448
redqueen4448 redqueen4448
  • 24-04-2020
Down because the “a” term in the equation is negative
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DeanR
DeanR DeanR
  • 24-04-2020

It's a rocket ship, it's going to go up then down, up being positive height, so the parabola opens down.

We can see that from the coefficient on the quadratic term, here -4.9.   When it's positive we get a CUP, concave up positive, i.e. opening up, vertex at the minimum.  When it's negative we get a CDN, concave down negative, opening down, vertex at the max.

Answer: down

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