y is directly proportional to √X

When x = 49, y = 4

(Not from the question, remember that this "When x = 49, y = 4," is to find K)


a) Find a formula for y in terms of x.


Workout:

Step 1:

Y= k√X

4= k √49

4= k (7) (Here the 7 is in multiplication, now we'll divide it meaning 4/7)

4/7= K


Step 2:

To find the formula:

y= 4/7 √X (Final relation)


Answer for a) y= 4/7 √x