Question

7. If a set of data points has a trend line of y = 4.2x - 3, what is the predicted value of x when

y = 5.4?
A
3
D
1.5

Answer 1

The predicted value of x = 2

Explanation:

y = 4.2x - 3 is the given equation.

Now, y = 5.4

Putting in the above equation, we get

5.4 = 4.2x - 3

or, 5.4 + 3 = 4.2x

or, 8.4 = 4.2 x

⇒ x = 8.4/4.2

⇒ x = 2