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Question

A parabola is graphed on a coordinate plane. The x-axis ranges from negative 10 to 3 in increments of 1. The y-axis ranges from negative 10 to 10 in increments of 1.

Determine whether the a-value is positive or negative. Provide an appropriate reason.

(1 point)
Responses

The a-value is negative because the x-intercepts are negative.
The a -value is negative because the x -intercepts are negative.

The a-value is negative because the graph is of a parabola that opens down.
The a -value is negative because the graph is of a parabola that opens down.

The a-value is positive because the graph is of a parabola that opens up.
The a -value is positive because the graph is of a parabola that opens up.

The a-value is negative because the y-intercept is negative.
The a -value is negative because the y -intercept is negative.
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Answer 1

The correct response is:

The a-value is negative because the graph is of a parabola that opens down.

This indicates that the coefficient "a" in the quadratic equation is negative, causing the parabola to open downwards rather than upwards.