Question

A point lies on the line 3x+2y=12 the x coordinate of the point is 1 work out the y coordinate ?

Answer 1

`9/2=4.5`.

Explanation:

If the required point `(1,y')` lies on the given line `3x+2y=12`,

then these co-ordinates must satisfy the given equation.

Plugging in the given eqn., we have,

`3(1)+2y'=12, or, 2y'=12-3=9," so that, "y'=9/2`, is

the desired `y"-co-ordinate."`