Use the image to answer the question.

A coordinate plane shows a graph of an upward-sloping, diagonal, dashed line, with shading extending from the line to the left. The line starts in quadrant 3, extends through quadrant 4, and ends in quadrant 1.

Is the point (0,−3) a solution to the inequality y>45x−3 , as shown on the graph?

(1 point)
Responses

Yes, because (0,−3) falls within the shaded region.
Yes, because left parenthesis 0 comma negative 3 right parenthesis falls within the shaded region.

Yes, because (0,−3) falls on the boundary line.
Yes, because left parenthesis 0 comma negative 3 right parenthesis falls on the boundary line.

No, because (0,−3) falls on the boundary line.
No, because left parenthesis 0 comma negative 3 right parenthesis falls on the boundary line.

No, because (0,−3) falls within the shaded region.

1 answer

To determine whether the point (0, -3) is a solution to the inequality \(y > 45x - 3\), we need to analyze the information provided about the graph.

  1. The line represented by the equation \(y = 45x - 3\) is dashed, indicating that points on the line are not included in the solution set (the inequality is strict).
  2. The shading extends from the line to the left, which indicates that all points to the left of the line satisfy \(y > 45x - 3\).
  3. The point (0, -3) lies on the y-axis.

To check if (0, -3) is above the line, substitute \(x = 0\) into the equation of the line:

\[y = 45(0) - 3 = -3.\]

Thus, the line at \(x = 0\) is \(y = -3\), which means that (0, -3) lies directly on the boundary line.

Since the line is dashed, (0, -3) is not included in the solution set for the inequality \(y > 45x - 3\).

Now, let's analyze the responses:

  • "Yes, because (0,−3) falls within the shaded region." - Incorrect. (0, -3) is on the line, not in the shaded region.
  • "Yes, because (0,−3) falls within the shaded region." - Same as above, incorrect.
  • "Yes, because (0,−3) falls on the boundary line." - Incorrect for the inequality provided.
  • "Yes, because (0,−3) falls on the boundary line." - Same reasoning is applied, incorrect.
  • "No, because (0,−3) falls on the boundary line." - Correct. The point falls on the line and is not a solution to the inequality.
  • "No, because (0,−3) falls within the shaded region." - Incorrect. It does not fall within the shaded region.

Thus, the correct response is: No, because (0,−3) falls on the boundary line.