The table shows the wavelength of the sound produced by keys on a piano x keys away from the a above middle c.
using the exponential regression model, which is the best prediction of the wavelength of the key that is 8 above the a above middle c?

49.3149.4449.7349.78

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )