I believe the answer is -2, 7
Answer:
The equation of the least-squares regression line for this plot is approximately ŷ = 3.8 + two thirds times x.
Step-by-step explanation:
5x+12 5/7=72 5/7
subtract 12 5/7 from each side
5x +12 5/7 - 12 5/7=72 5/7- 12 5/7
5x = 60
divide by 5 on each side
x = 60/5
x=12
He can use 4 half dollars, since 2 half dollars make a whole dollar.
He can use 2 regular dollars, since each 1 dollar bill plus another is 2.
He can also use 8 quarters because 4 Quarters makes a whole dollar.