Answer:  #7 is A and #8 is D
Step-by-step explanation:
 
        
                    
             
        
        
        
kilogram is an si unit my friend
 
        
                    
             
        
        
        
Y=5/2x+5 because the slope is 5/2 and the y-intercept is 5
        
             
        
        
        
Answer:
aaaannnnnnsssswwweeeerrr fffoooorrrr thhhhhiiisss pppprrroobbllleeemmm is s+14
 
        
             
        
        
        
Answer:
y=3/2x-7 
Step-by-step explanation:
the equation of the line for slope-intercept form is y=mx+b, where  m is the slope and b is the y intercept. 
we are given two points: (4,-1) and (8,5) 
the equation for slope is (y2-y1)/(x2-x1) 
label the points: 
x1=4
y1=-1
x2=8
y2=5
now substitute into the equation: 
m=(5--1)/(8-4)
m=6/4
m=3/2
the slope of the line is 3/2 
here is our equation so far: 
y=3/2x+b
we need to find b
since the equation will pass through the points, we can substitute either one into the equation to find b 
let's use (4,-1) as an example 
substitute into the equation 
-1=3/2(4)+b
-1=6+b
-7=b
the y intercept is -7
so the equation is y=3/2x-7
hope this helps!