Question

can someone help me rn?

Answer 1

Answer:

y = 1

Step-by-step explanation:

Given:

• equation of the parabola:  $y=a(x-1)^2+q$
• points on the parabola: (-1, -9) and (1, 1)

Substitute point (1, 1) into the given equation of the parabola to find q:

$\begin{aligned}\textsf{At}\:(1,1)\implies a(1-1)^2+q &=1\\a(0)^2+q &=1\\q &=1\end{aligned}$

Substitute the found value of q and point (-1, -9) into the given equation of the parabola to find a:

$\begin{aligned}\textsf{At}\:(-1,-9)\implies a(-1-1)^2+1 &=-9\\a(-2)^2+1 &=-9\\4a+1 &=-9\\4a &=-10\\a &=-\dfrac{5}{2}\end{aligned}$

Therefore, the equation of the parabola is:

$y=-\dfrac{5}{2}(x-1)^2+1$

The maximum or minimum point on a parabola is the vertex.

Vertex form of a parabola: $y=a(x-h)^2+k$  where (h, k) is the vertex.

Therefore, the vertex of the parabola is (1, 1) and so the maximum value of y = 1

Answer 2

• y=a(x-1)²+q

Vertex at (1,q)

There is a point already given from which parabola passes through its (1,1)

• So q=1

Hence

• vertex=(1,1)

Equation:-

• y=a(x-h)²+k
• y=a(x-1)²+1

Now put (-1,-9)

• -9=a(-2)²+1
• -9=4a+1
• 4a=-10
• a=-5/2

a is negative hence parabola is opening downwards

So

vertex is maximum

Max value

• y=1