Presume y=kx +b,then substitute (3,0)&(5,4), 
When x=3,y=0,so 3k+b=0;
 When x=5,y=4,so 5k+b=4;
Now u can know that k=2,b=-6.
The answer is:y=2x-6.
        
             
        
        
        
Start with

Add 2x to both sides:

Subtract 21 from both sides:

Divide both sides by 5. Since it is positive, we don't have to change the inequality sign:

So, the answer is 
 
        
             
        
        
        
<span><span>Step One:<span> Identify two points on the line.</span></span><span>Step Two:<span> Select one to be (x</span>1<span>, y</span>1<span>) and the other to be (x</span>2<span>, y</span>2).</span><span>Step Three:<span> Use the slope equation to calculate slope. hope this helps </span></span></span>
        
                    
             
        
        
        
The area is 70in^2 because you find the area of the square without the missing piece then subtract area of missing piece from total