diff --git a/src/egui_app.rs b/src/egui_app.rs
index 7f1e702..da88597 100644
--- a/src/egui_app.rs
+++ b/src/egui_app.rs
@@ -523,7 +523,7 @@ impl epi::App for MathApp {
 
                             function.update_bounds(minx_bounds, maxx_bounds, available_width);
 
-                            let (back_values, bars, derivative) = function.run();
+                            let (back_values, integral, derivative) = function.run();
                             let func_str = function.get_func_str();
                             plot_ui.line(back_values.color(Color32::RED).name(func_str));
 
@@ -535,8 +535,8 @@ impl epi::App for MathApp {
                                 );
                             }
 
-                            if let Some(bars_data) = bars {
-                                let (integral_bar, integral_line, area) = bars_data;
+                            if let Some(integral_data) = integral {
+                                let (integral_bar, integral_line, area) = integral_data;
                                 let integral_name = format!("Integral of {}", func_str);
                                 match self.settings.integral_display_type {
                                     IntegralDisplay::Rectangles => plot_ui.bar_chart(
diff --git a/src/function.rs b/src/function.rs
index 1499945..c2916fa 100644
--- a/src/function.rs
+++ b/src/function.rs
@@ -189,7 +189,7 @@ impl FunctionEntry {
             false => None,
         };
 
-        let front_bars = match self.integral {
+        let integral_data = match self.integral {
             true => {
                 if self.front_cache.is_none() {
                     let (data, area) = self.integral_rectangles();
@@ -205,19 +205,19 @@ impl FunctionEntry {
             false => None,
         };
 
-        (back_values, front_bars, derivative_values)
+        (back_values, integral_data, derivative_values)
     }
 
     pub fn run(&mut self) -> (Line, Option<(BarChart, Line, f64)>, Option<Line>) {
-        let (back_values, front_data_option, derivative_option) = self.run_back();
+        let (back_values, integral_data_option, derivative_option) = self.run_back();
 
         (
             Line::new(Values::from_values(back_values)),
-            if let Some(front_data1) = front_data_option {
+            if let Some(integral_data) = integral_data_option {
                 Some((
-                    BarChart::new(front_data1.0),
-                    Line::new(Values::from_values(front_data1.1)),
-                    front_data1.2,
+                    BarChart::new(integral_data.0),
+                    Line::new(Values::from_values(integral_data.1)),
+                    integral_data.2,
                 ))
             } else {
                 None