Find the value of y for a given value of x, if y varies directly with x. if y=3.3 when x=1.65, what is y when x=4.85?

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

so

In this problem

Find the value of k

substitute the value of x and y

the equation is equal to

For

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed