yes you are right the increase of the amount of bitcoin in market is dependent on the number of miners as greater the number of miners so greater will be the amount of bitcoin in market however the price of bitcoin is depend on the numbers of users of bitcoin because when the users of bitcoin are greater then the demand of bitcoin will be increase which inturn increase the price of bitcoin and the investors are also the reason of increase in bitcoin price.
What do you mean by number of miners?
The amount or price in bitcoin depends on the demand of users. Miners produced bitcoin but without demand of it, then there will be no increase in it's price. You just almost stated it. Maybe you are talking with the quantity of bitcoin but still like we said, no demand, no price increase, no hype, no investors .
Demand is the main factor why price increase. News and speculation are some of the examples who are making those demands since speculations will revolved around it.