Fifty students were randomly selected to take part in a survey about their favorite school lunch. each student was allowed to only pick one item. the results are shown below. food item preferred number of students pizza 27 cheeseburger 14 salad bar 9 based on the information above, if the school served 500 lunches, how many pizzas can they expect to serve?

The expected number of pizza servings is 270.

Step-by-step explanation:

Food Item    Preferred Number of Students

pizza                 27

cheeseburger14

salad bar           9

Now we have been given that Fifty students were randomly selected to take part in a survey about their favorite school lunch. The school will be serving 500 lunches;

This means 10% of the total lunches or students were selected. So, if 27 students prefer pizza this means its 10 times will be needed for the whole lot making it pizzas.

Similarly, 140 cheeseburgers and 90 salad bars will be served making a tital of = lunches.

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!