Solution:
The equation representing number of pizzas sold during weeks when different numbers of coupons were issued is
⇒y = 3.4 x + 43 ---------(1)
the equation is linear, where
x=numbers of coupons issued.
y =number of pizzas sold during weeks
If number of coupons issued that is, x=0
Substituting the value of x, in equation (1) gives value of y
→y = 3.4 × 0 + 43
→y= 43
Average number of pizzas sold in one night if no coupons are issued=43
Option (C)→→43
