You have to write a equation

y = 3 sin 4x

Step-by-step explanation:

For y = a sin bx,

a is the amplitude which is the crest of the graph. In this case a = 3 from the given graph.

Now, b is associated with the period where; b = 2π/period

From the graph the period which is the time between where the graph crosses the x-axis = π/2

Thus; b = 2π/(π/2)

b = 4

Thus,equation is; y = 3 sin 4x

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.