If the vertex of a parabola is (8,10) , what is the axis of symmetry?

Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost.swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Which system of linear inequalities is represented by the graph?