Question

Please help urgently with this question

Answer 1

Answer: 13787.20

Explanation:

If you use a ti-84 calculator you can plug in your points like a scatter plot

>STAT

>L1 = x's

>L2 = y's

>STAT

>CALC

>4:LinREg(ax+b)

>Calculate

It gives back that a = 628.8

b=9385.6

So:

y = 628.8x + 9385.6 >This is the line that best fits your data

2002-2003 5

2003-2004 6

2004-2005 7 Plug 7 into equation to find estimated tuition

y = 628.8(7) + 9385.6

y= 13787.20

Answer 2

• Answer:

Hence, y = 638x + 9337

Explanation:

• Calculate:

By using two points and those are:

(1,9975) and (3,11251) we can find the slope like this:

m = y2 - y1 / x2 - x1

m = 11251 - 9975 / 3 - 1

m = 1276 / 2

m = 638

• Write the equation:

Therefore using the slop-intercept form we can find the equation:

y - y1 = m(x - x1)

y - 9975 = 638(x - 1)

y - 9975 = 638x - 638

y = 638x - 638 + 9975

y = 638x + 9337: This is the Answer

• Conclusion:

Therefore, the prediction of the cost of college tuition in:

2004 - 2005

x = 7

y = 638 (7) + 9337

y = 4466 + 9337

y = 13803

Hence it is: $13803

Hope it helps!