Question 161421
I'm assuming that the interval is *[Tex \LARGE \left(-\infty,\frac{5}{3}\right)]



Set-Builder notation: *[Tex \LARGE \left\{x\|x<\frac{5}{3}\right\}]



note: the variable may change (ie it's not always "x")



Graph :


{{{drawing(500,80,-5, 15,-10, 10,
number_line( 500, -5, 15),


arrow(5/3,0,-5,0),
arrow(5/3,0.30,-5,0.30),
arrow(5/3,0.15,-5,0.15),
arrow(5/3,-0.15,-5,-0.15),
arrow(5/3,-0.30,-5,-0.30),




circle(5/3,0,0.3),
circle(5/3,0,0.3),
circle(5/3,0,0.3),
circle(5/3,0,0.3-0.02)
)}}}



Take note of the open circle at the endpoint