Answer:
Step-by-step explanation:
8).
Given,
For no. Of shirts = 10, price per shirt = $9
For no. Of shirts = 25, price per shirt = $8.40
.
Linear equation be,
y = mx + b
x 10 25
y 9 8.4
9 = 10m + b (i)
8.4 = 25m + b (ii)
Now,
(i) 9 = 10 m + b b = 9 - 10m
(ii) 8.4 = 25m + b 8.4 = 25m + 9 - 10m
8.4 - 9 = 15m m = -0.6/15 = -0.04
m = - 0.04
b = 9 - 10m = 9 - 10(-0.04) = 9+0.4 = 9.4
b = 9.4
The linear equation,
y = mx + b
y = -0.04x + 9.4
