"平均変化率" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 国際音声記号あり",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "へいきんへんかりつ"
    },
    {
      "form": "平󠄁均變化󠄁率󠄁",
      "raw_tags": [
        "旧字体"
      ]
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "日本語 解析学",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "関数y=f(x)のxがaからbまで変化するときの(f(b)-f(a))/(b-a)のこと。b→aの極限をとると微分係数f'(a)に一致する。"
      ],
      "id": "ja-平均変化率-ja-noun-210KFdQe",
      "topics": [
        "mathematical analysis"
      ]
    }
  ],
  "sounds": [
    {
      "form": "へーきんへんかりつ",
      "raw_tags": [
        "東京式"
      ],
      "roman": "[hèékíńhéńkáꜜrìtsù]",
      "tags": [
        "Nakadaka"
      ]
    },
    {
      "ipa": "[he̞ːkʲĩɰ̃hẽ̞ŋka̠ɾʲit͡sɨᵝ]"
    }
  ],
  "word": "平均変化率"
}

{
  "categories": [
    "日本語",
    "日本語 名詞",
    "日本語 国際音声記号あり"
  ],
  "forms": [
    {
      "form": "へいきんへんかりつ"
    },
    {
      "form": "平󠄁均變化󠄁率󠄁",
      "raw_tags": [
        "旧字体"
      ]
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "categories": [
        "日本語 解析学"
      ],
      "glosses": [
        "関数y=f(x)のxがaからbまで変化するときの(f(b)-f(a))/(b-a)のこと。b→aの極限をとると微分係数f'(a)に一致する。"
      ],
      "topics": [
        "mathematical analysis"
      ]
    }
  ],
  "sounds": [
    {
      "form": "へーきんへんかりつ",
      "raw_tags": [
        "東京式"
      ],
      "roman": "[hèékíńhéńkáꜜrìtsù]",
      "tags": [
        "Nakadaka"
      ]
    },
    {
      "ipa": "[he̞ːkʲĩɰ̃hẽ̞ŋka̠ɾʲit͡sɨᵝ]"
    }
  ],
  "word": "平均変化率"
}