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Determine whether the parabola y equals -x2 plus 15x plus 8 opens up down left or right?
Wiki User
∙ 14y ago
when you have
y=+/-x2 +whatever, the parabola opens up
y=-(x2 +whatever), the parabola opens down
x=+/-y2 +whatever, the parabola opens right
x=-(y2 +whatever), the parabola opens left
so, your answer is up
Wiki User
∙ 14y ago
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Determine in which direction the parabola opens y equals x2-7x plus 18?
A parabola opens upwards if the quadratic coefficient - the number before the "x2" is positive; downward if it is negative. Note that x2 is the same as 1x2.
The maximum or minimum of a parabola depending on whether the parabola opens up or down?
A parabola opening up has a minimum, while a parabola opening down has a maximum.
A parabola that opens upward?
Is a parabola whose directrix is below its vertex.
If a is greater than 0 the parabola opens?
Upwards.
How does finding the vertex of a parabola help you when graphing a quadratic equation?
Finding the vertex of the parabola is important because it tells you where the bottom (or the top, for a parabola that 'opens' downward), and thus where you can begin graphing.
Determine in which direction the parabola opens y equals x2-7x plus 18?
A parabola opens upwards if the quadratic coefficient - the number before the "x2" is positive; downward if it is negative. Note that x2 is the same as 1x2.
What is maximum or minimum of a parabola depending on whether the parabola opens up or down?
Vertex
The maximum or minimum of a parabola depending on whether the parabola opens up or down?
A parabola opening up has a minimum, while a parabola opening down has a maximum.
How does the value of a variable affect the direction the parabola opens?
If the value of the variable is negative then the parabola opens downwards and when the value of variable is positive the parabola opens upward.
A parabola that opens upward?
Is a parabola whose directrix is below its vertex.
The equation y -3x2 describes a parabola. Which way does the parabola open?
The given terms can't be an equation without an equality sign but a negative parabola opens down wards whereas a positive parabola opens up wards.
What direction does the parabola open?
If the equation of the parabola isy = ax^2 + bx + c, then it opens above when a>0 and opens below when a<0. [If a = 0 then the equation describes a straight line, and not a parabola!].
How do you know if a parabola has a minimum or maximum value?
When you look at the parabola if it opens downwards then the parabola has a maximum value (because it is the highest point on the graph) if it opens upward then the parabola has a minimum value (because it's the lowest possible point on the graph)
How does the value of c affect the direction the parabola opens?
if the value is negative, it opens downard
What does the a stand for in y equals ax2 plus bx plus c?
y = ax2 + bx + cThe graph is always a parabola.'a', 'b', and 'c' are numbers. Different values for 'a', 'b', and 'c' produce parabolas with different widths,noses at different heights and different left-right locations. They determine whether the parabolaopens up or opens down, and whether it crosses the 'x' and 'y' axes, and if so, where it crosses.
If a is greater than 0 the parabola opens?
Upwards.
The parabola opens downward the vertex is called?
The maximum.
