What is the constant of proportionality?

$0.7

Step-by-step explanation:

number of songs is x

total cost is y

k is the constant of proportionality

k=y/x

k always stays the same for it to be proportional throughout the whole chart.

example=

8.4/12=11.2/16=13.3/19

answer: 590

step-by-step explanation:

y-y1=4(x-x1)

step-by-step explanation:

this is point-slope form since you only have 4 as the slope it goes in place of m

hope this : )