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y=-2x² + 8x + 5a=b=C=OpensupordownmaxorminAxis of symmetryVertexy-intercept

Sagot :

4.

y=-2x² + 8x + 5

So, the function is a quadratic function in the form:

y=ax² + bx + c

So:

a=-2

b=8

c=5

To answer the next points we have to graph it:

As we can see, the graph opens down (a<0)

Since it opens down it has a maximum

The axis of symmetry is the vertical line that separates the function into 2 equal halves, in this case, the vertical line is x=2

The vertex is the maximum point (2,13)

and the y-intercepts are where x values are 0 (-0.55,0) and (4.55,0)

View image EugeniaI335813
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