Answer:
y - 4 = 4(x - 5) 
Explanation:
Pre-Solving
We are given that a line has a slope (m) of 4 and passes through the point (5,4). 
We want to write this equation in point-slope form.
Point-slope form is given as 
 , where m is the slope, and
, where m is the slope, and 
 is a point.
 is a point. 
Solving
Since we are given the slope and the point, we can immediately plug them into the formula.
Let's start with the slope; we can replace m in 
 with 4.
 with 4. 

We can now plug 5 for 
 and 4 for
 and 4 for 
 .
. 
y - 4 = 4(x - 5)