Question

solve the inequality and graph the solution.
1 > u - 1
plot the endpoints. select an endpoint to change it from closed to open. select the middle of the segment, ray, or line to delete it.

Explanation:

Step1: Isolate the variable u

Add 1 to both sides of the inequality $1>u - 1$.
$1+1>u-1 + 1$

Step2: Simplify the inequality

$2>u$, which can also be written as $u < 2$.

Answer:

The solution of the inequality is $u < 2$. On the number - line, we use an open circle at 2 (since 2 is not included in the solution) and draw a ray to the left of 2.