The graph shows a proportional relationship between the number of books sold at a yard sale and the amount of money collected from book sales.What is the constant of proportionality? 0.67 1 1.5 2

Answer:
it's C. 1.5
Step-by-step explanation:
I did the test
Answer:
c 1.5
Step-by-step explanation:
You take the y 6 then divide by the x 4 which equals 1.5 which is the constant of proportionality!!