Question

How do you graph `y= x + 3`?

Answer 1

Draw three points satisfying the equation and join them to form a straight line.

Explanation:

To draw the graph of the equation `y=x+3`, one needs to find at least three sets of `(x, y)` (as this is a linear equation and hence represents a straight line) which satisfy this equation. (Although two should be alright, three are preferable as any set of wrong numbers will show up.)

Let us take wide spread values of `x`m say `-8`, `0` and `8`. Putting these in the equation `y=x+3`, we get `y` as `-5`, `3` and `11` respectively.

Hence, three sets of `(x, y)` are `(-8, -5)`, `(0, 3)` and `(8, 11)`. Now draw these points and join them to form a straight line.