00:01
Okay, so i'm seeing that you need help with this problem, and it says the projections of male life expectancy at age 65 in the united states are summarized in the following table.
00:11
So x equals zero.
00:13
So this corresponds to the year 2000.
00:16
Okay.
00:17
And then this means that this is 2010, 2020, and so on and so forth.
00:22
Okay.
00:23
Find the equation of the least squares line for this data, round all coefficients to two decimal places.
00:30
Okay, so how i would do this is let me see here.
00:37
So it goes 15 .5 minus 16 .4 minus 15 .5.
00:47
So that's 0 .9.
00:51
And then 17 .2 minus 16 .4, 0 .8.
00:58
And then 18 .1 minus 17 .2, 0 .9, and then this is 0 .8, and this is 1.
01:12
So i'm going to add all these up, 0 .9 plus 0 .8 plus 0 .9 plus 0 .1, plus 1.
01:19
And then i'm going to divide that by 1, 2, 3, 4, 5.
01:26
And so i'm getting y equals 0 .88 divided by 10x plus 15 .5.
01:44
So 0 .88 divided by 10 .5.
01:45
So 0 .88 divided by 10 is y equals 0 .088x plus 15 .5.
01:55
So that's my equation.
01:58
So y equals 0 .08x plus 15 .5.
02:05
Use the result from part a to estimate the life expectancy at 65 of a meal in 2040.
02:13
Round your answer to one decimal place.
02:16
So i would say, okay, y equals 0 .088 times 40 plus 15 .5.
02:26
So 40 times 0 .088 and y equals 3 .52 plus 15 .5...