A plausible solution
clf;
figure;
% Create a distance vector of range 1m to 3m
distance = linspace(1,3,101);
hold on
% plot a line with color red
plot(distance,Paver,'r');
% To plot the markers
% plot(x variable, y variable,'Marker','+');
hold off
% Set the title, x-axis and y-axis
title('Average Power as a function of distance');
xlabel('Distance in meters');
ylabel('Optical Power');
