First of all you need to know that there are two types of nature of salts solubility.
If heat energy is absorbed or needed in the process of dissolving salt then it is known as Endothermic in Nature . In this Nature, the solubility increases with rise temperature.
If heat energy is evolved or released in the process of dissolving of salts then it is known as E xothermic in Nature . In this nature, solubility decreases with rise in temperature.
Examples of Salts that are Endotheremic in nature. - NaCl ( Sodium chloride ) , KCl ( Pottasium Chloride ) , NaNO2 ( Sodium Nitrate ) , NH4Cl ( Ammonium Chloride ) etc.
Examples of Salts that are Exotheremic in nature - Lithium Carbonate ( Li2CO3 ) , Na2CO3 ( Sodium Carbonate monohydrate ) , Cerium Sulfate [ Ce(SO4)2 ] etc.
Now to your question, If the salt is if endotheremic nature then the solubility will rise on increase in temperature , for ex if the solubility of NaCl is 54 at 36 degree celcius, then if there is rise in the temp. the solubility may become 56 or 58 or [ 54 + x ].
And if the salt is of exotheremic nature than it 's solubility will decrease if there is any rise in temp, for ex if the solubility of Na2CO3 is 51 at temperature 36 degree celcius, then if there is any rise in the temperature the solubility may becom 50 or 48 or 43 or [ 51 - x ].