SOLUTION: The accompanying table shows the percent of the adult population that married before age 25 in several different years. Write a linear equation in y=mx+b form to represent this sit

Algebra ->  Systems-of-equations -> SOLUTION: The accompanying table shows the percent of the adult population that married before age 25 in several different years. Write a linear equation in y=mx+b form to represent this sit      Log On


   

Question 1057618: The accompanying table shows the percent of the adult population that married before age 25 in several different years. Write a linear equation in y=mx+b form to represent this situation. If you could use the first and third data, it would be really helpful.
1971 42.4
1976 37.4
1980 37.1
1984 34.1
1989 32.1
1993 28.8
1997 25.7
2000 25.5


Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1971 42.4
1980 37.1
Use the data to find the slope of the equation,
m=%2842.4-37.1%29%2F%281971-1980%29=-5.3%2F9=-53%2F90
Use the point slope form of a line with either point,
y-42.4=-%2853%2F90%29%28x-1971%29
y-42.4=-%2853%2F90%29x%2B104463%2F90
y=-%2853%2F90%29x%2B104463%2F90%2B3816%2F90
y=-%2853%2F90%29x%2B108279%2F90