Question

How do I find the y-intercept of an equation in the form `y = mx + b`?

Answer 1

In an equation of the form `y = mx + b`, the y-intercept is "`b`"

The y-intercept is the `y` value when `x` is 0. It is the point on the y-axis where the line crosses it.

Let's see this through an example. Let's look at the equation:

`y = 4x + 5`

Let's plug in 0 for x:

`y = 4*0 + 5`
`y = 0 + 5`
`y = 5`

Which is the same as the value of "`b`" in the original equation.