$\"\"$

Observe the graph :

The total accmulated salary is equal to the area of the region bounded by the offer curve and

the $\"\"$ -axis.

Since the area under the curve of $\"\"$ is larger than the area of the curve of $\"\"$ , $\"\"$ is better because the accmulated salary is larger.

$\"\"$

$\"\"$ is better because the accmulated salary is larger.