Question

UP TO 50 POINTS ON BRAINLY

Answer 1

Answer:

273.075 millions users

Step-by-step explanation:

We can use the date and users as x and y values for our graph.

point 1 = (1994, 37.5)

point 2 = (1998, 70.0)

point 3 = (2002, 102.5)

We know that linear equation can be represented as y = mx + b

where m is the slope and b is the y intercept value when x equal to 0.

m = (y2 -y1)/(x2-x1) = (102.5 - 37.5)/(2002 -1994)

m = 8.125

Now let's solve for b by using point3 values.

102.5 = 8.125(2002) +b

b = -16163.8

Now predict two years from now.  Which is the year 2023.

For year 2023, how many mobile phone usage?

y = 8.125(2023) - 16163.8

y = 273.075 millions users

As for model robustness(reliability), it's fairly good be cause all three data points have consistent 8.125 slope.  So the predictivity is fairly accurate.