16.
1 answer:
Answer:
D. y= x^2 - 5x + 2
Step-by-step explanation:
Graph the parabola using the direction, vertex, focus, and axis of symmetry.
Direction: Opens Up
Vertex:
(
5
2
,
−
33
4
)
Focus:
(
5
2
,
−
8
)
Axis of Symmetry:
x
=
5
2
Directrix:
y
=
−
17
2
x
y
0
−
2
1
−
6
5
2
−
33
4
3
−
8
4
−
6
_______________
Graph the parabola using the direction, vertex, focus, and axis of symmetry.
Direction: Opens Up
Vertex:
(
5
4
,
−
9
8
)
Focus:
(
5
4
,
−
1
)
Axis of Symmetry:
x
=
5
4
Directrix:
y
=
−
5
4
x
y
−
1
9
0
2
5
4
−
9
8
2
0
3
5
_____________
Graph the parabola using the direction, vertex, focus, and axis of symmetry.
Direction: Opens Up
Vertex:
(
1
,
0
)
Focus:
(
1
,
1
8
)
Axis of Symmetry:
x
=
1
Directrix:
y
=
−
1
8
x
y
−
1
8
0
2
1
0
2
2
3
8
____________
Graph the parabola using the direction, vertex, focus, and axis of symmetry.
Direction: Opens Up
Vertex:
(
5
2
,
−
17
4
)
Focus:
(
5
2
,
−
4
)
Axis of Symmetry:
x
=
5
2
Directrix:
y
=
−
9
2
x
y
0
2
1
−
2
5
2
−
17
4
3
−
4
4
−
2
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Multply both sides of the equation by 7.
_____
When the variable is in the numerator of a proportion like this, you can solve it by multiplying by that denominator. That multiplication cancels the denominator and gives you the value of the variable.
In general, you multiply by the reciprocal of the coefficient of x. When that coefficient is 1/7, you multiply by 7/1. Of course, you know that 7/7 = 1 and that x/1 = x.