APPLICATIONS OF LINEAR EQUATIONS WORKSHEET

ANSWER KEY

1.         y = 0.4825(x – 1995) + 0.18         Prediction  y = $ 7.4175≈$7.42

2.        y = -749.5(x – 1999) + 4076          Prediction y = -4168.5, this answer is not reasonable since you can not have less than 0 stores

3.       y = -175(x-0) + 875 = -175x + 875

4.       S = L – 0.15L  = 0.85L

5.       y =11.50 +0.75x

6.       y = 179.5(x -2000) + 40571      Prediction y = 42366    m =179.5, which implies that Penn State University’s enrollment increases by approximately 180 students per year

7.       y = 2500 + 0.8x

8.       y = 934(x – 1990)+36531

9.        y = 120 + 0.55x

10.   y = 8250 -125x

11.   y = -18000x+200000

12.   a  C = 100 + 20x

b.  R = 24x

c.   P = 4x – 100

d.  25

13.    y =3.1(x- 1996) + 22 (in millions)

14.   y = -3.67(x – 1984) + 30

15.   y = 1.538(x – 1985)+ 0.51

16.   y = 280(x – 1988) + 4000

17.   y =-1.8x(x – 1993) +0.409