Write the increase and decrease intervals of all mathematical functions.

Y=kx+b, k>0, increasing function; K<0, negative function.

y=a(x+b)^2 + c，a & gt0:x & lt； -b, decreasing function; X & gt-b, the function is increasing. a & lt0:x & lt； -b, function increment; X & gt-b, the function is reduced.

Y=sin x: increase the interval (kpi-pi/2, kpi+pi/2) and decrease the interval (kpi+pi/2, kpi+3pi/2).

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