Skip designs tracks for amusement park rides. for a new design, the track will be elliptical. if the ellipse is placed on a large coordinate grid with its center at (0, 0), the equation (the drawing ^) models the path of the track. the units are given in yards. how long is the major axis of the track? explain how you found the distance.

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!