This study aims to analyze the influence of price and product quality variables on the demand for Kerupuk Opak at UD. Karya Bersama. This research is a quantitative study utilizing primary data collected through questionnaires distributed to 30 customers, using a saturated sampling technique. Data collection methods include questionnaires and literature studies. Instrument testing consists of validity and reliability tests, while classical assumption tests include normality, heteroscedasticity, and multicollinearity tests. Data were analyzed using multiple linear regression with the help of SPSS version 26. The results show that the price variable does not have a significant effect on product demand (tvalue = -0.253 < ttable = 1.70329; significance > 0.05), whereas the product quality variable has a significant effect on product demand (tvalue = 5.391 > ttable = 1.70329; significance < 0.05). Simultaneously, price and product quality significantly influence product demand (Fvalue = 65.853 > Ftable = 3.35; significance = 0.000 < 0.05).

Language is very important for human life because through it they can communicate with each other. Language is also used to communicate one's ideas, concepts, opinions, feelings and thoughts to other people. as well as a tool for personal growth and interaction with others. This research aims to find out how important it is to use Indonesian properly and correctly, what causes the widespread use of slang, especially among teenagers, and how slang influences the use of Indonesian. In processing the data in this article, the literature study method was used to study various literature. Slang has caused the decline of good and correct Indonesian language martabak. Today's society has been influenced by technological advances which have triggered the emergence of slang. National identity and Indonesian as an official language must be strengthened so that it is not influenced by slang.