Slope =4, passing through (7,2), the point-slope form equation is y-2=4(x-7). What is the function notation?

we have the equation
y-2=4(x-7)
Convert to slope-intercept form
y=mx+b
Isolate the variable y
y-2=4x-28
y=4x-28+2
y=4x-26 -------> equation in slope-intercept form
Convert to function notation