Y-intercept: 0
Slope: 4
Explanation 
Y-intercept is the number without the x which in this case is no number so it’s 0 so that’s where the point in the y axis goes
Slope is rise over run so if the equation is 2y = 8x then we can simplify this by dividing both sides by 2 which would be y = 4x so slope is 4/x. Which is basically 4/1 because the x means over one so up 4 units and to the right once 
Hope this helps
        
             
        
        
        
Answer:
b) 33
Step-by-step explanation:
You reverse the process of finding the second average, 21, which will help you find the original average, 25. First you multiply the second average, 21, to retrace your steps. We do this because the last thing we do when we find the average is divide. when you multiply 21 you get 42. Now you have the value of the first two numbers. Then you experiment with the numbers. To save time I'll get to the point. When you add 33 + 42 you get 75. Then you divide by 3 to get 25. You divide by three because the instructions say there was 3 numbers to start with. Hope this helps.
 
        
             
        
        
        
(1-z) can combine with other coupons
        
             
        
        
        
I believe that they are both the first answer because when the sign has a line under it, it is darken in the circle
        
             
        
        
        
Answer:
B
Step-by-step explanation:
A graph is only a function when there is only one y value for each x value. 
A trick is to draw a line through some points on the x-axis, and if the line goes through more than one point. Then it is not a function. (See picture) 
Sorry, not all the lines are straight, but you get the point. B is the only one that doesn't have more than one point on the lines I drew.