Answer:
When the price of a single skateboard is increased, the overall demand decreases.
Step-by-step explanation:
A shop owner wants to know what the effect would be of increasing the price on skate boards he sells in his store.
Initially the skateboards were sold for $200 but he decided to increase the price. So he increased the price to $300.
The number of skateboards sold were initially 10 and then decreased to 7 after the price of the skateboards were increased.
Hence we conclude that after the prices were increased, the sale of skateboards decreased.