How do you graph #-x>=20# on the coordinate plane?

1 Answer
smendyka
Jun 30, 2018

See a solution process below:

Explanation:

First solve for #x# by multiplying each side of the inequality by #color(blue)(-1)#. However, because we are multiplying or dividing an inequality by a negative number we need to reverse the inequality operator:

#color(blue)(-1) xx -x color(red)(<=) color(blue)(-1) xx 20#

#x color(red)(<=) -20#

graph{x + 20 <= 0 [-100, 100, -50, 50]}

The boundary line is a solid line because the inequality operator contains an or equal to clause

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