The amount of money that Sarah earns varies directly with the number of hours worked. If Sarah earns $320 for working 40 hours, determine the constant of proportionality.(1 point) Responses 9 9 8 8 7 7 6

To determine the constant of proportionality, divide Sarah's earnings by the number of hours worked:

$320/40 hours = $<<320/40=8>>8/hour

The constant of proportionality is 8.