If
f(x) is a function.
Then,
Graph of f(x)+k will shift vertically k units up.
Graph of f(x)-k will shift vertically k units down.
Graph of f(x+k) will shift horizontally k units left.
Graph of f(x-k) will shift horizontally k units right.
Graph of -f(x) will reflect vertically or about x-axis.
Graph of f(-x) will reflect horizontally or about y-axis.
Graph of kf(x) will vertically stretch k times. Here, k must be greater than 1.
Graph of f(kx) will horizontally compress k times. Here, k must be greater than 1.