QUESTION IMAGE
Question
find the midpoint of the segment with the given endpoints:
(-3, -1), (-1, 9)
midpoint = ( , )
<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Midpoint Formula",
"Coordinate Geometry"
],
"new_concepts": [],
"current_concepts": [
"Midpoint Formula",
"Coordinate Geometry"
]
}
</pre_analysis>
<reasoning>
Identify the given endpoints
\[
(x_1, y_1) = (-3, -1),\quad (x_2, y_2) = (-1, 9)
\]
Apply the midpoint formula
\[
\]
State the midpoint coordinates
\[
(x_m, y_m) = (-2, 4)
\]
</reasoning>
<answer>
Find the midpoint of the segment with the given endpoints:
\((-3, -1)\), \((-1, 9)\)
Midpoint = ( <blank>-2</blank> , <blank>4</blank> )
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Geometry",
"Midpoint Formula"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Midpoint Formula",
"Coordinate Geometry"
],
"new_concepts": [],
"current_concepts": [
"Midpoint Formula",
"Coordinate Geometry"
]
}
</pre_analysis>
<reasoning>
Identify the given endpoints
\[
(x_1, y_1) = (-3, -1),\quad (x_2, y_2) = (-1, 9)
\]
Apply the midpoint formula
\[
\]
State the midpoint coordinates
\[
(x_m, y_m) = (-2, 4)
\]
</reasoning>
<answer>
Find the midpoint of the segment with the given endpoints:
\((-3, -1)\), \((-1, 9)\)
Midpoint = ( <blank>-2</blank> , <blank>4</blank> )
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Geometry",
"Midpoint Formula"
]
}
</post_analysis>