y=4

The slope-intercept form is y=mx+b, where m is the slope and b is the y-intercept.

y=mx+b

Simplify 4.

Rewrite 4 as 22.

y=22

Pull terms out from under the radical, assuming positive real numbers.

y=2

y=2

y=2

Using the slope-intercept form, the y-intercept is 2.

b=2

Find the Y-Intercept y = square root of 4