Q4

function plotSeriesTrend(mu, sigma, y, coeffs)
    derp(1) = polyval(coeffs, 1);
    derp(2) = polyval(coeffs, length(y));
    plot(1:1:length(y), y, ':b');
    hold on;
    plot([1,length(y)], derp, ':c');
    hold on;

    pootis = sprintf('Simulated time series: n = %d, mu = %f, sigma = %f', length(y), mu, sigma);
    title(pootis);


end