Answer:
y = 6
Step-by-step explanation:
Given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 3 when x = 9, then
k = =
=
, thus
y = x ← equation of variation
When x = 18, then
y = × 18 =
= 6
Step-by-step explanation:
4 is the A or Ampltiude
To find the period set it equal to 2 pi/B
b=
b=
There is no phase shift
The midline or d or vertical shift is 1.
Our equation for 8 is
9.Use sin function. The a value is 2 or -2 your choice.
Set up the period equal to the equation
Which equal 6.
B=6
There is no C and the D and Vertical Shift is 1.
Our equation is
