M partially varies as N and P is constant when M=2,N=3,when M=4,and N=2.find M,when N=1

Answer 1

Sounds like M = aN + P
If so, then using the two points,
3a+P = 2
2a+P = 4
Solve for a and P, and then use them to find M(1)

But just looking, we see that M increased by 2 when N decreased by 1. So, decreasing N again would give M=6

Answer 2

I'll try thanks