diff --git a/assets/math.js b/assets/math.js
index ff44f1e..c1c0c9e 100644
--- a/assets/math.js
+++ b/assets/math.js
@@ -29,18 +29,23 @@ function defineVars(vars) {
 
 function plot(target, fns, deps, [xDomain, yDomain] = [[-1, 9], [-1, 9]]) {
     const depsEl = deps.map(document.querySelector.bind(document));
+    
+    const data = () => fns(...(depsEl.map(el => parseFloat(el.value)))).map(fn => ({
+        fn, graphType: 'polyline'
+    }));
+
+    const opts = {
+        target,
+        width: 600,
+        height: 400,
+        xAxis: { domain: xDomain },
+        yAxis: { domain: yDomain },
+        grid: true
+    };
+
     const plot = () => {
-        functionPlot({
-            target,
-            width: 600,
-            height: 400,
-            xAxis: { domain: xDomain },
-            yAxis: { domain: yDomain },
-            grid: true,
-            data: fns(...(depsEl.map(el => parseFloat(el.value)))).map(fn => ({
-                    fn, graphType: 'polyline'
-                }))
-        });
+        opts.data = data();
+        functionPlot(opts);
     }
 
     depsEl.forEach(el => {