Question

The scatter plot below shows the number of pizzas sold during weeks when different numbers of coupons were issued. The equation represents the linear model for this data. y = 3.4x + 43 According to the model, how many more pizzas are sold for each additional coupon issued?

Answer 1

43 pizzas would be sold if no coupons were used

Answer 2

3.4 pizzas

Explanation:

The slope intercept form of a line is

`y=mx+b` .... (1)

where, m is slope and b is y-intercept.

A scatter plot shows the number of pizzas sold during weeks when different numbers of coupons were issued.

The given regression equation is

`y=3.4x+43` .... (2)

On comparing (1) and (2), we get

`m=3.4, b=43`

It means the initial number of pizzas is 43 and the number of pizzas sold increased by 3.4 for each additional coupon issued.

Therefore, the 3.4 more pizzas are sold for each additional coupon issued.