The cost of a machine is supposed to depreciate each year by 12% of its value at
the beginning of the year. If the machine is
valued at 344,000 at the beginning of 2008,
find its value
(i) at the end of 2009.
(ii) at the beginning of 2007.​

Cost of machine in 2008 = Rs 44,000
Depreciation rate = 12%
(i) ∴ Cost of machine at the end of 2009

First locate the turning point (vertex) of the graph. which is at the coordinates x=5 and y=9 or (5; 9).to determine whether it's a maximum or mininum value, you have to discern whether the vertex's y-value is the highest value or lowest value the graph can reach. since the vertex's y-value, 9 is the highest value the graph can reach, it will be a maximum.another basic way to determine whether the vertex's value is max or min is to see if the graph is smiling or sad. if it's smiling, the turning point/vertex would be a minimum, while a sad parabola would have a maximum y-value at the vertex.