Question is as follows:
In the xy-plane, triangular region R is bounded by the lines x=0, y=0, and 4x + 3y = 60. Which of the following points lie insider region R?
a - 2,18
b - 5,12
c - 10,7
d - 12,3
e - 15,2
Now my working matched the solution to the step of identifying the x-int and y-int but beyond that there is a divergence. The solution suggests that we need to try adding all the answer choices to the equation and then checking if they match or not
How I attempted it was - max value of Y is 20 and max value of X is 15. If the choice satisfies both, it lies within the region. I do not understand why that’s incorrect.
Thanks