Draw graph of the following expression. Also find extremum value if it exists. `y=|x-2|+|x-1|+|x+1|+|x+2|`

Draw graph of the following expression. Also find extremum value if it exists. y=|2x-1|+|x-1|

Draw graph of the following expression. Also find extremum value if it exists. y=|x-1|-|x-6|

Draw graph of the following expression. Also find extremum value if it exists. y=|x-1|-|x-6|

Draw graph of the following expression. Also find extremum value if it exists. y=|2x-5|-2|2x+5|

Draw the graphs of the following : x^(2) -1 = y

Draw the graph of the following y=4x, from the graph find the value of y when x=-2.

(b) Draw the graph of the expression (2x+7)/(3) . Also, find the value of the expression when x=4 and the value of x for which the value of the expression is 0 from the graph.

Draw the graph of the following y = cos^(-1) ( 2x^(2) - 1)

Draw the graph of the following y = cos^(-1) ( 2x^(2) - 1)

Draw the graph of the following y = cos^(-1) ( 2x^(2) - 1)