Question 19
An influencer is planning a lunch banquet. The equation models the relation between the
cost in dollars, , of the lunch banquet and the number of guests, .
Find the cost if the number of guests is 60 .
The cost is
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To find the cost for 60 guests, you simply need to substitute with 60 in the given equation . This gives you . Calculating this, you get . So, the cost is $2030.

Understanding how to create and use linear equations is super valuable! It’s not just for math homework — this kind of modeling can be seen in business for budgeting events or even in designing systems. Knowing how costs change with different inputs helps in planning and forecasting, making it easier to prevent budget overruns.