Based on the costs incurred, both fixed and variable, the expense function is 10.21 + 8.53x
The expense function is:
= Fixed costs + Variable costs x Number of activity
The fixed cost in this instance is $10.21.
The variable cost is $8.53
The number of activities is family tutorial sessions and we can represent this as x.
The expense function is therefore:
= 10.21 + 8.53x
In conclusion, the expense function is 10.21 + 8.53x
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