Prices for hair perming and coloring services at Hair Today Salon are as follows: SHORT hair gets a coloring service for $30 and perm for $50. LONG hair gets a coloring service for $50 and perm for $80. Over the course of one week, one of the stylists: Celeste, collected $840 for coloring the hair of 20 different clients. How many of those clients had long hair?

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

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: