Answer:
B
Explanation:
Charge of 9 gigs for A
find slope:
125 - 95/5 - 3 = 30/2 = $15/month
use point slope form with point (3,95) and slope 15:
y - y1 = m(x - x1)
y - 95 = 15(x - 3)
y - 95 = 15x - 45
+ 95 +95
y = 15x + 50
put 9 for x, gigs, in the new equation:
y = 15(9) + 50
y = 135 + 50
y = 185
$185 for opt A
Charge of 9 gigs for B
slope = 0
there is the fee of 150 so the equation is:
y = 0x + 150
Next find the price for 9 gigs
y = 9(0) + 150
y = 150
$150 for opt B
Charge of 9 gigs for C
use graph and the cost is about $157
A: $185
B: $150
C: $157