Answer:

Step-by-step explanation:
Consider f(x)=sinx
We need to find the period of f(x)
We know that the period of sinax is 
Here f(x)=sinx⇒a=1
Therefore period of the function f(x)=sinx is 2π
C) 4/7 is not equal to 1/2
Answer:
y = 5x-7
Step-by-step explanation:
y-y/x-x = slope
-12-3/-1-2 = -15/-3 = 5
next plug in slope and coordinates
y=mx+b
3=5(2)+b
solve for b
3=10+b
-7=b
I think the answer is 0,-4 if i did the equation correctly
That can be expressed as 2(x+6).