The lower bound of  54000/600 (each number is correct to 2 sf) is

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation:

i would say c

step-by-step explanation: