от -∞ до 3
(-∞;3] график функции: ⬇⬇⬇⬇⬇
*̸̵̵̵̸̴̴̸̴̵̸̸̸̵̵̡͓̫͍̺͇͎̻͍̼̼̦͎͓̝̪͍̼̘̟͇̞͇̞͓͎̻̺͔̺̞̘̺̟̞̞̞͍̓̓͒́̈́̾́̽́͐̾̒̓̒̾̈́̔̽̽͌̔̒͐͌͊͒͑̈́̓͊͛̓̀̕͘͘͘͜͠͠͠*̵̴̵̵̸̵̴̴̵̴̵̸̵̴̸̢̡̡̠͍̝͉̘̦͍͇̠̠̙̠͇͓͖͍̙̼̙̦̦̻̙͓̺̙̘͓̪̻͕͔͇̼̪̘̼̔͆̈́̐͌̔̽̿̓͑͋̓̓͛̈́̓̈́͛͋̒͐̒̿̔̾͋̿̈́͑͌̚̕̚͘̚̕͝͠͠͝͝*̸̵̸̴̴̸̵̸̴̴̴̴̴̸̵̵̴̡̦̻̫̺̘͕̺̠̼͙̘̠̦͕̝͕̼̞̟̺͔̠͖͖͚̼͔͎͉̼̼̻̻̞͖̝͙͓͓̙͍͊͛̐̾̿͆̾́͐̓́͋̈́̒̓̽͊̀͑̓̓́͌̀́̓͆̒͆̽͆̒́͑͒̈́͑̓͒̕̕͜͜͜͜͝͠͝͝*̸̸̸̴̴̵̸̵̵̵̵̵̸̴̴̴̸̸̢̪̼͖̫̝͍͇̼̘͕̘͍̪̦͔̪̪̪̞͍̼͙̼͕͖̪̫̺̠̦͙̝̦͍͚̠̘̦͍̦͖̼͖͉̙͎̾̈́̓̾̿̓͋̽͛̔͊͌̈́̀͋̓̓̒̔̒̿͒͛͊̀͒͋̒͋̔͌͐͌͛̓͘̕̚̕̚͘̕͜͝͝͠͝͝͝͝͝͝*̸̸̴̵̸̸̵̸̴̵̴̸̸̸̸̡̡̟͓̠̙̦̪͔̘̞͖̫͕̦̼͔̻͕͉͓͓͉͓̙̼̙͓̪̼̪̫͍͎͇̻̞͛͋̈́̒̽͛̓̈́̒̀͊̔̒͆͛̓̓̾̔͐̽̒͊̽̐͒́̈́̔͑̓̕̚̚̕͜͜͠͠͝͝͝͝͠͠*̴̵̸̴̴̵̴̸̸̵̸̸̴̵̡̡̡̡̢͔̦̼̼̞͇͎̘͎̻͕̻̠͓̝̫̠͚̝͚͕͎͍͓͕̺͙͉̻̝͔̙͍̟͊̽̀̓̓͌͆́̈́͋͐͑̓̾͑͊͑͆̔̐͌̓̒͌͋̚͘͘̚͘͜͜͝͠͠͝͠͝͝͝͠͝*̸̴̵̴̴̵̴̸̵̴̴̴̴̵̴̴̵̸̡̡̢̪͍͉̫͕̠̞̠̺̟͓͕̦̻͓̞͚̼͉̞͇͓̞̪̙͍͙̺͉͇̦̘͍͎͍͎̪͕̙͇̞̟̘͓͉̼̞̘͆͛̐̔͐͆̈́́̔̔̓͌͐̿͑͆̐͑͊͐͒͋͐̓͑͋͌̿̓̾͊̒͋̈́͊͊̚͘̚̕̕̚͘̕̕͝͠͝͠͠*̵̴̸̴̴̴̸̴̵̴̴̡̢̢̡̺̙͙͇͙̞̼͍͚͓̙̫͇͇̘͎̙͙̝̙͔͙̻͐͑͌͐̓͆̓͌̿̐̽͑̒̈́̾͋̐̽̔͌̈́̀͛͆́͐̕͘͜͜͝͝͝*̸̵̵̸̴̸̴̸̸̵̸̴̸̵̸̢̢̡̼͎͕̼̠̼̙͇͎͚̟̝̦̫͉̟̪̟͉̝̦̘͕̼͔͔͔̙̫͎̫̙͕̝͉̫͍̻͑͒̔̈́̈́̓̐͑̐̾̒̽͌͋̈́͋̀̈́͊͑̓̓͒̓͊̈́͑͑̈́͆̽͊̈́̐̚̚̕̕̕͜͝͝͝͠*̸̵̴̴̸̸̸̸̸̸̸̸̴̵̡̡̡̢͚̘̼̟͙͎͍̘̺͍̼͓̫̦̻͚̝̟͓̻͎͚̟̼͔̫̺͉̫͓͕̞̺̟̓͆̐̈́̿̒̔͒͋͛̽͛̿͑͋̿͌͛͆̽̿͋̿̒̔͑̈́̿̚̚͘͘̚̚͘̕͜͜͝͠͝*̸̵̵̵̸̴̴̸̴̵̸̸̸̵̵̡͓̫͍̺͇͎̻͍̼̼̦͎͓̝̪͍̼̘̟͇̞͇̞͓͎̻̺͔̺̞̘̺̟̞̞̞͍̓̓͒́̈́̾́̽́͐̾̒̓̒̾̈́̔̽̽͌̔̒͐͌͊͒͑̈́̓͊͛̓̀̕͘͘͘͜͠͠͠*̵̴̵̵̸̵̴̴̵̴̵̸̵̴̸̢̡̡̠͍̝͉̘̦͍͇̠̠̙̠͇͓͖͍̙̼̙̦̦̻̙͓̺̙̘͓̪̻͕͔͇̼̪̘̼̔͆̈́̐͌̔̽̿̓͑͋̓̓͛̈́̓̈́͛͋̒͐̒̿̔̾͋̿̈́͑͌̚̕̚͘̚̕͝͠͠͝͝*̸̵̸̴̴̸̵̸̴̴̴̴̴̸̵̵̴̡̦̻̫̺̘͕̺̠̼͙̘̠̦͕̝͕̼̞̟̺͔̠͖͖͚̼͔͎͉̼̼̻̻̞͖̝͙͓͓̙͍͊͛̐̾̿͆̾́͐̓́͋̈́̒̓̽͊̀͑̓̓́͌̀́̓͆̒͆̽͆̒́͑͒̈́͑̓͒̕̕͜͜͜͜͝͠͝͝*̸̸̸̴̴̵̸̵̵̵̵̵̸̴̴̴̸̸̢̪̼͖̫̝͍͇̼̘͕̘͍̪̦͔̪̪̪̞͍̼͙̼͕͖̪̫̺̠̦͙̝̦͍͚̠̘̦͍̦͖̼͖͉̙͎̾̈́̓̾̿̓͋̽͛̔͊͌̈́̀͋̓̓̒̔̒̿͒͛͊̀͒͋̒͋̔͌͐͌͛̓͘̕̚̕̚͘̕͜͝͝͠͝͝͝͝͝͝*̸̸̴̵̸̸̵̸̴̵̴̸̸̸̸̡̡̟͓̠̙̦̪͔̘̞͖̫͕̦̼͔̻͕͉͓͓͉͓̙̼̙͓̪̼̪̫͍͎͇̻̞͛͋̈́̒̽͛̓̈́̒̀͊̔̒͆͛̓̓̾̔͐̽̒͊̽̐͒́̈́̔͑̓̕̚̚̕͜͜͠͠͝͝͝͝͠͠*̴̵̸̴̴̵̴̸̸̵̸̸̴̵̡̡̡̡̢͔̦̼̼̞͇͎̘͎̻͕̻̠͓̝̫̠͚̝͚͕͎͍͓͕̺͙͉̻̝͔̙͍̟͊̽̀̓̓͌͆́̈́͋͐͑̓̾͑͊͑͆̔̐͌̓̒͌͋̚͘͘̚͘͜͜͝͠͠͝͠͝͝͝͠͝*̸̴̵̴̴̵̴̸̵̴̴̴̴̵̴̴̵̸̡̡̢̪͍͉̫͕̠̞̠̺̟͓͕̦̻͓̞͚̼͉̞͇͓̞̪̙͍͙̺͉͇̦̘͍͎͍͎̪͕̙͇̞̟̘͓͉̼̞̘͆͛̐̔͐͆̈́́̔̔̓͌͐̿͑͆̐͑͊͐͒͋͐̓͑͋͌̿̓̾͊̒͋̈́͊͊̚͘̚̕̕̚͘̕̕͝͠͝͠͠*̵̴̸̴̴̴̸̴̵̴̴̡̢̢̡̺̙͙͇͙̞̼͍͚͓̙̫͇͇̘͎̙͙̝̙͔͙̻͐͑͌͐̓͆̓͌̿̐̽͑̒̈́̾͋̐̽̔͌̈́̀͛͆́͐̕͘͜͜͝͝͝*̸̵̵̸̴̸̴̸̸̵̸̴̸̵̸̢̢̡̼͎͕̼̠̼̙͇͎͚̟̝̦̫͉̟̪̟͉̝̦̘͕̼͔͔͔̙̫͎̫̙͕̝͉̫͍̻͑͒̔̈́̈́̓̐͑̐̾̒̽͌͋̈́͋̀̈́͊͑̓̓͒̓͊̈́͑͑̈́͆̽͊̈́̐̚̚̕̕̕͜͝͝͝͠*̸̵̴̴̸̸̸̸̸̸̸̸̴̵̡̡̡̢͚̘̼̟͙͎͍̘̺͍̼͓̫̦̻͚̝̟͓̻͎͚̟̼͔̫̺͉̫͓͕̞̺̟̓͆̐̈́̿̒̔͒͋͛̽͛̿͑͋̿͌͛͆̽̿͋̿̒̔͑̈́̿̚̚͘͘̚̚͘̕͜͜͝͠͝*̸̵̵̵̸̴̴̸̴̵̸̸̸̵̵̡͓̫͍̺͇͎̻͍̼̼̦͎͓̝̪͍̼̘̟͇̞͇̞͓͎̻̺͔̺̞̘̺̟̞̞̞͍̓̓͒́̈́̾́̽́͐̾̒̓̒̾̈́̔̽̽͌̔̒͐͌͊͒͑̈́̓͊͛̓̀̕͘͘͘͜͠͠͠*̵̴̵̵̸̵̴̴̵̴̵̸̵̴̸̢̡̡̠͍̝͉̘̦͍͇̠̠̙̠͇͓͖͍̙̼̙̦̦̻̙͓̺̙̘͓̪̻͕͔͇̼̪̘̼̔͆̈́̐͌̔̽̿̓͑͋̓̓͛̈́̓̈́͛͋̒͐̒̿̔̾͋̿̈́͑͌̚̕̚͘̚̕͝͠͠͝͝*̸̵̸̴̴̸̵̸̴̴̴̴̴̸̵̵̴̡̦̻̫̺̘͕̺̠̼͙̘̠̦͕̝͕̼̞̟̺͔̠͖͖͚̼͔͎͉̼̼̻̻̞͖̝͙͓͓̙͍͊͛̐̾̿͆̾́͐̓́͋̈́̒̓̽͊̀͑̓̓́͌̀́̓͆̒͆̽͆̒́͑͒̈́͑̓͒̕̕͜͜͜͜͝͠͝͝*̸̸̸̴̴̵̸̵̵̵̵̵̸̴̴̴̸̸̢̪̼͖̫̝͍͇̼̘͕̘͍̪̦͔̪̪̪̞͍̼͙̼͕͖̪̫̺̠̦͙̝̦͍͚̠̘̦͍̦͖̼͖͉̙͎̾̈́̓̾̿̓͋̽͛̔͊͌̈́̀͋̓̓̒̔̒̿͒͛͊̀͒͋̒͋̔͌͐͌͛̓͘̕̚̕̚͘̕͜͝͝͠͝͝͝͝͝͝*̸̸̴̵̸̸̵̸̴̵̴̸̸̸̸̡̡̟͓̠̙̦̪͔̘̞͖̫͕̦̼͔̻͕͉͓͓͉͓̙̼̙͓̪̼̪̫͍͎͇̻̞͛͋̈́̒̽͛̓̈́̒̀͊̔̒͆͛̓̓̾̔͐̽̒͊̽̐͒́̈́̔͑̓̕̚̚̕͜͜͠͠͝͝͝͝͠͠*̴̵̸̴̴̵̴̸̸̵̸̸̴̵̡̡̡̡̢͔̦̼̼̞͇͎̘͎̻͕̻̠͓̝̫̠͚̝͚͕͎͍͓͕̺͙͉̻̝͔̙͍̟͊̽̀̓̓͌͆́̈́͋͐͑̓̾͑͊͑͆̔̐͌̓̒͌͋̚͘͘̚͘͜͜͝͠͠͝͠͝͝͝͠͝*̸̴̵̴̴̵̴̸̵̴̴̴̴̵̴̴̵̸̡̡̢̪͍͉̫͕̠̞̠̺̟͓͕̦̻͓̞͚̼͉̞͇͓̞̪̙͍͙̺͉͇̦̘͍͎͍͎̪͕̙͇̞̟̘͓͉̼̞̘͆͛̐̔͐͆̈́́̔̔̓͌͐̿͑͆̐͑͊͐͒͋͐̓͑͋͌̿̓̾͊̒͋̈́͊͊̚͘̚̕̕̚͘̕̕͝͠͝͠͠*̵̴̸̴̴̴̸̴̵̴̴̡̢̢̡̺̙͙͇͙̞̼͍͚͓̙̫͇͇̘͎̙͙̝̙͔͙̻͐͑͌͐̓͆̓͌̿̐̽͑̒̈́̾͋̐̽̔͌̈́̀͛͆́͐̕͘͜͜͝͝͝*̸̵̵̸̴̸̴̸̸̵̸̴̸̵̸̢̢̡̼͎͕̼̠̼̙͇͎͚̟̝̦̫͉̟̪̟͉̝̦̘͕̼͔͔͔̙̫͎̫̙͕̝͉̫͍̻͑͒̔̈́̈́̓̐͑̐̾̒̽͌͋̈́͋̀̈́͊͑̓̓͒̓͊̈́͑͑̈́͆̽͊̈́̐̚̚̕̕̕͜͝͝͝͠*̸̵̴̴̸̸̸̸̸̸̸̸̴̵̡̡̡̢͚̘̼̟͙͎͍̘̺͍̼͓̫̦̻͚̝̟͓̻͎͚̟̼͔̫̺͉̫͓͕̞̺̟̓͆̐̈́̿̒̔͒͋͛̽͛̿͑͋̿͌͛͆̽̿͋̿̒̔͑̈́̿̚̚͘͘̚̚͘̕͜͜͝͠͝*̸̵̵̵̸̴̴̸̴̵̸̸̸̵̵̡͓̫͍̺͇͎̻͍̼̼̦͎͓̝̪͍̼̘̟͇̞͇̞͓͎̻̺͔̺̞̘̺̟̞̞̞͍̓̓͒́̈́̾́̽́͐̾̒̓̒̾̈́̔̽̽͌̔̒͐͌͊͒͑̈́̓͊͛̓̀̕͘͘͘͜͠͠͠*̵̴̵̵̸̵̴̴̵̴̵̸̵̴̸̢̡̡̠͍̝͉̘̦͍͇̠̠̙̠͇͓͖͍̙̼̙̦̦̻̙͓̺̙̘͓̪̻͕͔͇̼̪̘̼̔͆̈́̐͌̔̽̿̓͑͋̓̓͛̈́̓̈́͛͋̒͐̒̿̔̾͋̿̈́͑͌̚̕̚͘̚̕͝͠͠͝͝*̸̵̸̴̴̸̵̸̴̴̴̴̴̸̵̵̴̡̦̻̫̺̘͕̺̠̼͙̘̠̦͕̝͕̼̞̟̺͔̠͖͖͚̼͔͎͉̼̼̻̻̞͖̝͙͓͓̙͍͊͛̐̾̿͆̾́͐̓́͋̈́̒̓̽͊̀͑̓̓́͌̀́̓͆̒͆̽͆̒́͑͒̈́͑̓͒̕̕͜͜͜͜͝͠͝͝*̸̸̸̴̴̵̸̵̵̵̵̵̸̴̴̴̸̸̢̪̼͖̫̝͍͇̼̘͕̘͍̪̦͔̪̪̪̞͍̼͙̼͕͖̪̫̺̠̦͙̝̦͍͚̠̘̦͍̦͖̼͖͉̙͎̾̈́̓̾̿̓͋̽͛̔͊͌̈́̀͋̓̓̒̔̒̿͒͛͊̀͒͋̒͋̔͌͐͌͛̓͘̕̚̕̚͘̕͜͝͝͠͝͝͝͝͝͝*̸̸̴̵̸̸̵̸̴̵̴̸̸̸̸̡̡̟͓̠̙̦̪͔̘̞͖̫͕̦̼͔̻͕͉͓͓͉͓̙̼̙͓̪̼̪̫͍͎͇̻̞͛͋̈́̒̽͛̓̈́̒̀͊̔̒͆͛̓̓̾̔͐̽̒͊̽̐͒́̈́̔͑̓̕̚̚̕͜͜͠͠͝͝͝͝͠͠*̴̵̸̴̴̵̴̸̸̵̸̸̴̵̡̡̡̡̢͔̦̼̼̞͇͎̘͎̻͕̻̠͓̝̫̠͚̝͚͕͎͍͓͕̺͙͉̻̝͔̙͍̟͊̽̀̓̓͌͆́̈́͋͐͑̓̾͑͊͑͆̔̐͌̓̒͌͋̚͘͘̚͘͜͜͝͠͠͝͠͝͝͝͠͝*̸̴̵̴̴̵̴̸̵̴̴̴̴̵̴̴̵̸̡̡̢̪͍͉̫͕̠̞̠̺̟͓͕̦̻͓̞͚̼͉̞͇͓̞̪̙͍͙̺͉͇̦̘͍͎͍͎̪͕̙͇̞̟̘͓͉̼̞̘͆͛̐̔͐͆̈́́̔̔̓͌͐̿͑͆̐͑͊͐͒͋͐̓͑͋͌̿̓̾͊̒͋̈́͊͊̚͘̚̕̕̚͘̕̕͝͠͝͠͠*̵̴̸̴̴̴̸̴̵̴̴̡̢̢̡̺̙͙͇͙̞̼͍͚͓̙̫͇͇̘͎̙͙̝̙͔͙̻͐͑͌͐̓͆̓͌̿̐̽͑̒̈́̾͋̐̽̔͌̈́̀͛͆́͐̕͘͜͜͝͝͝*̸̵̵̸̴̸̴̸̸̵̸̴̸̵̸̢̢̡̼͎͕̼̠̼̙͇͎͚̟̝̦̫͉̟̪̟͉̝̦̘͕̼͔͔͔̙̫͎̫̙͕̝͉̫͍̻͑͒̔̈́̈́̓̐͑̐̾̒̽͌͋̈́͋̀̈́͊͑̓̓͒̓͊̈́͑͑̈́͆̽͊̈́̐̚̚̕̕̕͜͝͝͝͠*̸̵̴̴̸̸̸̸̸̸̸̸̴̵̡̡̡̢͚̘̼̟͙͎͍̘̺͍̼͓̫̦̻͚̝̟͓̻͎͚̟̼͔̫̺͉̫͓͕̞̺̟̓͆̐̈́̿̒̔͒͋͛̽͛̿͑͋̿͌͛͆̽̿͋̿̒̔͑̈́̿̚̚͘͘̚̚͘̕͜͜͝͠͝*̸̵̵̵̸̴̴̸̴̵̸̸̸̵̵̡͓̫͍̺͇͎̻͍̼̼̦͎͓̝̪͍̼̘̟͇̞͇̞͓͎̻̺͔̺̞̘̺̟̞̞̞͍̓̓͒́̈́̾́̽́͐̾̒̓̒̾̈́̔̽̽͌̔̒͐͌͊͒͑̈́̓͊͛̓̀̕͘͘͘͜͠͠͠*̵̴̵̵̸̵̴̴̵̴̵̸̵̴̸̢̡̡̠͍̝͉̘̦͍͇̠̠̙̠͇͓͖͍̙̼̙̦̦̻̙͓̺̙̘͓̪̻͕͔͇̼̪̘̼̔͆̈́̐͌̔̽̿̓͑͋̓̓͛̈́̓̈́͛͋̒͐̒̿̔̾͋̿̈́͑͌̚̕̚͘̚̕͝͠͠͝͝*̸̵̸̴̴̸̵̸̴̴̴̴̴̸̵̵̴̡̦̻̫̺̘͕̺̠̼͙̘̠̦͕̝͕̼̞̟̺͔̠͖͖͚̼͔͎͉̼̼̻̻̞͖̝͙͓͓̙͍͊͛̐̾̿͆̾́͐̓́͋̈́̒̓̽͊̀͑̓̓́͌̀́̓͆̒͆̽͆̒́͑͒̈́͑̓͒̕̕͜͜͜͜͝͠͝͝*̸̸̸̴̴̵̸̵̵̵̵̵̸̴̴̴̸̸̢̪̼͖̫̝͍͇̼̘͕̘͍̪̦͔̪̪̪̞͍̼͙̼͕͖̪̫̺̠̦͙̝̦͍͚̠̘̦͍̦͖̼͖͉̙͎̾̈́̓̾̿̓͋̽͛̔͊͌̈́̀͋̓̓̒̔̒̿͒͛͊̀͒͋̒͋̔͌͐͌͛̓͘̕̚̕̚͘̕͜͝͝͠͝͝͝͝͝͝*̸̸̴̵̸̸̵̸̴̵̴̸̸̸̸̡̡̟͓̠̙̦̪͔̘̞͖̫͕̦̼͔̻͕͉͓͓͉͓̙̼̙͓̪̼̪̫͍͎͇̻̞͛͋̈́̒̽͛̓̈́̒̀͊̔̒͆͛̓̓̾̔͐̽̒͊̽̐͒́̈́̔͑̓̕̚̚̕͜͜͠͠͝͝͝͝͠͠*̴̵̸̴̴̵̴̸̸̵̸̸̴̵̡̡̡̡̢͔̦̼̼̞͇͎̘͎̻͕̻̠͓̝̫̠͚̝͚͕͎͍͓͕̺͙͉̻̝͔̙͍̟͊̽̀̓̓͌͆́̈́͋͐͑̓̾͑͊͑͆̔̐͌̓̒͌͋̚͘͘̚͘͜͜͝͠͠͝͠͝͝͝͠͝*̸̴̵̴̴̵̴̸̵̴̴̴̴̵̴̴̵̸̡̡̢̪͍͉̫͕̠̞̠̺̟͓͕̦̻͓̞͚̼͉̞͇͓̞̪̙͍͙̺͉͇̦̘͍͎͍͎̪͕̙͇̞̟̘͓͉̼̞̘͆͛̐̔͐͆̈́́̔̔̓͌͐̿͑͆̐͑͊͐͒͋͐̓͑͋͌̿̓̾͊̒͋̈́͊͊̚͘̚̕̕̚͘̕̕͝͠͝͠͠*̵̴̸̴̴̴̸̴̵̴̴̡̢̢̡̺̙͙͇͙̞̼͍͚͓̙̫͇͇̘͎̙͙̝̙͔͙̻͐͑͌͐̓͆̓͌̿̐̽͑̒̈́̾͋̐̽̔͌̈́̀͛͆́͐̕͘͜͜͝͝͝*̸̵̵̸̴̸̴̸̸̵̸̴̸̵̸̢̢̡̼͎͕̼̠̼̙͇͎͚̟̝̦̫͉̟̪̟͉̝̦̘͕̼͔͔͔̙̫͎̫̙͕̝͉̫͍̻͑͒̔̈́̈́̓̐͑̐̾̒̽͌͋̈́͋̀̈́͊͑̓̓͒̓͊̈́͑͑̈́͆̽͊̈́̐̚̚̕̕̕͜͝͝͝͠*̸̵̴̴̸̸̸̡̡͚̘̼̟͙͎͍̘̺͍̼͓̫̦̓͆̐̈́̿̒̔͒͋͛̽͛̿͑̚̚͘͜͝͠.
F= 1.8 * (-9) + 32
F= -16.2 + 32
F= 15.8
Вроде бы так;)