B and D both work, hope you found this helpful!
Answer:
when x=3, y=9
Step-by-step explanation:
Direct variation is y=kx, and since its x^2, the equation is y=kx^2. so is x is 3, then y is 9
The last option $2.40 per person
Answer:
cos(x)+1 or cos x + 1
Step-by-step explanation:
The wave starts at y=2 this means it is a cosine function, then the first positive x-intercept is at about (pi, 0) which is about 3, this leads to cos x + 1 as the answer.