Y=7 x=2 what is the value of x when y=21

y=4.98

Explanation:

First, find the constant of proportionality , k.

y=kx
21=7k
k=3

We now start over and solve for y using the new value of x and the obtained value of k.

y=(3)(1.66)
y=4.98

The value of x would 6. Y divided by x would get you 3.5, therefore 21 divides by 3.5 is 6.

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.