A manufacturer is producing two types of units. Each unit Q costs $9 for for labor and each unit R costs $6 for parts and $20 for labor. The manufacturer's
budget is $810 for parts and $1800 for labor. If the income per unit is $150 for Q and
$175 for R, how many units of each should be manufactured to maximize income?

Areflection of shape i across the y-axis, followed by a , and then a translation left 6 units and down 4 units confirms congruence between shape i and shape ii. alternatively, a of shape ii about the origin, followed by a reflection across the y-axis, and then a translation right 4 units and up 6 units confirms congruence between shape ii and shape i.