In order to make the whole problem easier, you would have to get all the numbers to have the same denominator which would be 60.
1/10 * 6 = 6/60
1/4 * 15 = 15/60
1/5 * 12 = 12/60
2/15 * 4 = 8/60
Now that all the numbers have the same denominator, you would add them to get 41/60.
In conclusion, the answer would be D.
Since the function is y = 3x, take any value of x and multiply it to get y.
If the y-coordinate is not 3 times the x-coordinate, it is not on the graph.
0 * 3 = 0, so (0, 0) is on the graph.
5 * 3 = 15, so (5, 15) is on the graph.
9 * 3 = 27, not 3, so (9, 3) is not on the graph.
7 * 3 = 21, so (7, 21) is on the graph.
2 , -5 , 1
those are the coefficients (C)
In simplest form, the answer is .13333 or 2/15