Los Angeles Unified School District (LAUSD) analyzes graduation and attrition rates of the 1982 graduating class from the district's 49 regular high schools as well as from continuation, opportunity, special education, and alternative and magnet schools. Graduates are senior high school students who earned a diploma, or passed the California High School Proficiency Examination. Statistics are based on the number of students who entered tenth grade in September 1979. This number was then adjusted for additional entrants and leavers over 3 years, yielding the June 1982 graduation rate and attrition rate. Attrition accounts for all former members of the class who left before graduating. Attrition totals included dropouts, but should not be construed as representing a dropout rate. The graduation rate for the 1982 class was 58%, an increase over 1981, and the attrition rate 42%, which is less than in 1981. Historical data show an increase in the number of graduates each year from 1967 to 1972, and then a decline. Budget Division reports from 1971, 1977, 1979, and 1980 also show a drop in the number of graduates. A factor apparently influencing this decrease was the curtailment of summer school programs. (PS)