A parabola is defined by the equation x2 = 3/4 y. In which direction will the parabola open?
1 answer:
The equation of parabola is 
.
The canonical equation of parabola is
and this parabola has branches that go in positive direction of x-axis.
Since in your equation x is changed to y and y to x, then the <span>branches of the parabola go in positive y-axis direction, the vertex is placed at the origin.
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The canonical equation of parabola is
Since in your equation x is changed to y and y to x, then the <span>branches of the parabola go in positive y-axis direction, the vertex is placed at the origin.
</span>
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b) The easiest way is to use a calculator such as a Casio brand or Sharp brand and key in 9P7 to get 181440.
However, you can also use this formula: where n is the total number of items and r is how many you are selecting.
Plug in values: