X is partly constant and partly varies with y.when X =11,y=3 and when X=14,y=4. Find the formula connecting X and y.
x = a+by
so, using your two points,
a+3b = 11
a+4b = 14
clearly, b=3, so a=2
x = 2 + 3y
so, using your two points,
a+3b = 11
a+4b = 14
clearly, b=3, so a=2
x = 2 + 3y