The equation of the line in point-slope form is given by:
 
 Where,
 (xo, yo): point that belongs to the line
 m: slope of the line
 The slope is given by: 

 Substituting values: 

 Rewriting: 
 
  
 
 Now we choose an ordered pair: 

 Substituting values we have: 
 
 
 We now rewrite the equation in its standard form: 

 Where,
 b: cut with the y axis.
 We have then: 
 Answer: point-slope form:
 Answer: point-slope form: 
 or 
 standard form
 standard form  
 
        
        
        
Answer:
Step-by-step explanation:
<u>Use ratios and solve:</u>
- 1 in ÷ 7 ft = x in ÷ 28 ft
- x = 28/7 in
- x = 4 in