The given figure represents the lines y = x + 1 and y = Write down the angles which the lines make with the positive direction of the x-axis. Hence, determine θ.

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The equation of the line PQ is 3y - 3x + 7 = 0.
(i) Write down the slope of the line PQ.
(ii) Calculate the angle that the line PQ makes with the positive direction of x-axis.