Person buys 6 granola bars and 4 cups of yogurt for $10.50. Person be buys for granola bars in 8 cups of yogurt for $11. Find the cost of each item

let the cost of granola bars be G and the cost of a cup of yogurt be Y.

For Person A: 6G + 4Y = 10.50

For Person B: 4G + 8Y = 11

Multiply first equation by 2: 12G + 8Y = 21

Subtract this by the 2nd equation: 8G = 10

Divide by 8: G = 1.25

Substitute back into the first equation: 6(1.25) + 4Y = 10.50

Y = 0.75

So a granola bar costs $1.25 and a cup of yogurt costs $0.75

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!