(Points plotted and connected in picture below)
Slope: 9
The slope represents the total cost depending on the number of DVDs ordered.
Y-intercept: 6
C/4 - 2c = 5/4 - c/2......multiply everything by 4
c - 8c = 5 - 2c
-7c = 5 - 2c
-7c + 2c = 5
-5c = 5
c = -5/5 = -1
Answer:
4
Step-by-step explanation:
Descarte's rule of signs tells you that there will be 0 or 2 positive real roots and 0 negative real roots. A graph shows there are no positive x-intercepts, so 0 real roots.
All four roots are complex.
The answer is in decimal formal in the file below
