Is this a function or not a function. Please help

its a function

Step-by-step explanation:

because your using the "x" numbers 1 time

NOT a function

Step-by-step explanation:

You can see if you plot the points on a graph it wouldn't be a straight line but somewhat out of place.  So its NOT a function.

we can't see all full 4 options, but if this is the full option, than the very left one is correct:

-2/5 * -3 3/4

remake the question, adding a picture of all the question, or write down the full left and right answers.

emily solved for a part when she should have solved for the whole. 875,000 should be the numerator of the equivalent ratio. 70 x 12,500 is 875,000. so the answer is 100 x 12,500 which is 1,250,000.