Adjust Fibonacci graph slide

lectures/complexity/slides.qmd

@@ -132,7 +132,9 @@ $$
 $$
 
 
-## graph
+## Fibonacci series example (3/3)
+
+**Performance Overview**
 
 ```{python}
 import time
@@ -147,10 +149,11 @@ x1 = list(range(30))
 x2 = list(range(60))
 y1 = [get_time(lambda: fib1(i)) for i in x1]
 y2 = [get_time(lambda: fib2(i)) for i in x2]
-plt.plot(x1, y1, label="fib1")
+plt.plot(x1, y1, label="fib1", ls='--')
 plt.plot(x2, y2, label="fib2")
-plt.xlabel("n")
-plt.ylabel("time / s")
+plt.yscale('log')
+plt.xlabel("Number n", fontsize=14)
+plt.ylabel("Time to compute [s]", fontsize=14)
 plt.legend()
 None
 ```