Question 558972
You can think of this as the sum of 2 equations:
{{{ y = 4 }}}
{{{ y = 5*tan( 2x - pi ) }}}
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You need a table with 3 entries:
{{{x}}}, {{{2x}}} - {{{pi}}}, {{{5*tan( 2x - pi )}}} 
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0, -pi, 0
pi/4, -pi/2, -infinity
pi/2, 0, 0
(3*pi)/4, pi/2, +infinity
pi, pi, 0
(5*pi)/4, -infinity
(3*pi)/2, 2*pi, 0
The values between zero and +- infinity all
get multiplied bt {{{ 5 }}}, and then get {{{ 4 }}} added to them
Here's the plot along with {{{ y = tan(x) }}}
{{{ graph( 500, 400, -2*pi, 2*pi, -6, 6, 4 + 5*tan( 2x - pi ), tan(x)) }}}