Item 7 you have 40 minutes to exercise at the gym, and you want to burn 300 calories total using both machines. how much time should you spend on each machine? elliptical trainer: 8 calories per minute stationary bike: 6 calories per minute you should spend minutes on the elliptical trainer and minutes on the stationary bike.

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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!

answer: the first one

step-by-step explanation: use a calculator and divide the minutes by the dollars.