Answer:
<h3>3.75</h3>
Step-by-step explanation:
Using Secant-Secant theorem we can find the value of x.
The product of one segment and its external segment is equal to the product of the other segment and its external segment.
5 × 3 = x × 4
15 = 4x
15/4 = x
3.75 = x
 
        
             
        
        
        
If the line is perpendicular, then its slope is the reciprocal of the given line's slope. This new line's slope is 1/2. We plug it into slope-intercept form
y = 1/2x + b
Now plug in the given point of (2, 10) and solve for b. 
10 = 1/2(2) + b
10 = 1 + b
9 = b
So your equation is y = 1/2x + 9
        
             
        
        
        
Answer:
2
Step-by-step explanation:
If we look at the graph this is an increasing graph where y increases with respect to x so in other words we can say that y is directly proportional to x.

and when we remove the proportionality sign we replace it with an equal to sign and a constant. So it becomes , 

now to find the Constant of proportionality which is k we can use any ordered pair(coordinate/point) from the graph, 
Lets take ( 2 , 4) where 2 represents the value of x on the x-axis and 4 represents the value of y on the y-axis so now,

so the constant of proportionality is 2
 
        
             
        
        
        
Eight tenths minus five tenths equals three tenths.