we took deez from gingerman thank you :D

expon.m

@@ -0,0 +1,15 @@
+% exponential model a * exp(b * x) 
+% y = a + b x
+clear;clc;close all;
+x = input("enter values of x:\n");
+y = input("enter values of y:\n");
+Y = log(y);
+n = length(x);
+coeff = [n sum(x);sum(x) sum(x.^2)];
+f_terms = [sum(Y);sum(x.*Y)];
+results = inv(coeff) * f_terms;
+A = results(1);
+a = exp(A);
+b = results(2);
+f = a * exp(b*x);
+plot(x, y,'',x, f);