Erica bought 11 pizzas for $4.99 each and x two-liter bottles of soda for $1.99 each for her birthday party. She knows that she spent more than $80
before tax on the soda and pizza. What is the smallest possible value for x,
the number of two-liter bottles that Erica purchased?"

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

you need to rotate this triangle about the origin 270 degrees clockwise to create the full square.