The equation y = 26.6x - 14.5 is used to model the worldwide smartphone sales, y, in millions, each year, x, for a given company in its first 7 years selling smartphones. according to the model, what is the annual increase in the smartphone sales over this time period?

a.
3.8 million phones per year

b.
12.1 million phones per year

c.
14.5 million phones per year

d.
26.6 million phones per year

D.  26.6 million phones per year

Step-by-step explanation:

Given: The equation is used to model the worldwide smartphone sales (y) in millions, each year (x) for a given company in its first 7 years selling smartphones.

Here the slope of the linear function(coefficient of x) = 26.6

Since, slope is the rate of change of the variables.

Therefore,the annual increase in the smartphone sales over this time period= 26.6 millions phones per year.

OR

When  x=1

When  x=2

The annual increase =

hence, the annual increase in the smartphone sales over this time period= 26.6 millions.

f(x) is the value of the function. b is the value of the function when x equals zero or the y-coordinate of the point where the line crosses the y-axis in the coordinate plane.

step-by-step explanation:

hope this !

sadsadsadsad

step-by-step explanation: