Question 1040274
x-intercept:  Let {{{y = 0}}}, substitute in place of {{{y}}} and then solve for {{{x}}}:  {{{0=x/2-4}}}, 
{{{x/2 =4}}} 
{{{x=2*4}}}
{{{x=8}}}
Point {{{A(8, 0)}}}
y-intercept:  Let {{{x = 0}}}, substitute in place of {{{x}}} and then solve for {{{y}}}:  {{{y=0/2-4}}}
{{{y =-4}}}
Point {{{B(0, -4)}}}
{{{graph( 300, 200, -1, 9, -5, 5, (1/2)x-4 )}}}