City is located at a height of 138 m above sea level while a town is at a height of 51 m below sea level represent the altitude of the town using a negative number hence find the difference in altitude between the city and town ​

189m

Step-by-step explanation:

Altitude of city = 138m. Altitude of town below sea level = 51m. = 189m.

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!

yes.. it's proven to be 36.