Which equation could be the equation of this parabola?
2 answers:
Parabolas in the form of 
open upwards or downwards.
Parabolas in the form of
open to the left or to the right.
Since this parabola opens upward, we know it must be in the form of. Also, if the coefficient of 'x' is positive, it opens upward, but if it is negative, it opens downward. This parabola opens upward, so we know that the coefficient of 'x' must be positive. Therefore, our answer must be D, 
Parabolas in the form of
Since this parabola opens upward, we know it must be in the form of
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Answer:
a) and
, b)
and
, c)
and
, d)
and
, e)
and
, f)
and
, g)
and
, h)
and
.
Step-by-step explanation:
Each system is solved as follows (Cada sistema es resuelto como sigue):
a) and
b) and
c) and
d) and
e) and
f) and
g) and
h) and