Beta = Cov(MrPr) / Var(Mr)
Where
Cov(MrPr) = Covariance between the market’s return and the portfolio return
Var(Mr) = Variance in the Market return (Square of Std deviation of Market)
Covariance = Correlation * Std deviation of Market * Std deviation of Portfolio
Covariance = 0.9 * 1.9 * 2.2 = 3.762
Beta = 3.762 / (1.9 * 1.9) = 1.04