Given equation y=7x+25.
where x represents number of people being served and y represetns number of minutes it takes to prepare a meal.
Number of people can be taken for x variable are 1,2,3,4...
From the given equation if we plug x=0, it gives y=7(0)+25= 0+25=25.
So, fix number of minutes is 25 minutes to prepare a meal.
If we take x=1, that means we are taking 1 extra person and if we plug x=1 in original function, we get y=7(1)+25= 7+25.
So, it is taking 7 extra minute to prepare a meal.
Let us check by adding one more person. For that we need to take 1+1=2 number of person.
On plugging x=2, we get y=7(2) +25 = 14+25 = 7+7+25.
So every time if we add extra person, the time increase by 7 minutes to prepare a meal.
Therefore, Option "C) For every extra person served, the time it takes to prepare a meal increases by 7 minutes." is correct option.
