Answer: 1 song is 1.3 the total cost of 25 songs would be 33.75
1. C
2.A
3.D
4. B These are the only math problems I can actually do because they're more like puzzles than anything.
Answer:
x = 52y
Step-by-step explanation:
A function is a process or a relation that associates each element x of a set X to a single element y of another set Y.
A. The equation 
represents vertical line. This is not a function, because one element x=5 is associated to all (not one) elements of 
B. The equation 
represents parabola that goes in positive x-direction. This is not a function, because each 
is associated to two different y. For examlpe, when x=10, then 
C. The equation 
represents parabola that goes in positive y-direction. This is the function, because for each x is associated only one y.
D. The equation 
represents hyperbola. This is not a function, because for one x there are two different possible y.
Answer: correct choice is C
