Question 10 The table below shows the number of goals by leading scorers for the Jack-Falcons Hockey team
Year-
2007
2008
2009
2010
2011
2012
2013
2014
Goals-
30
23
36
35
38
43
39
45
Write an equation for the line of best fit. Let x be the number of years since 2007 and round all values to the nearest hundredth
Answer
Fy=-2.5x+30
Gy=2.5x+30
Hy=-2.5x+27.25
Jy=2.5x+27.25
^picture the numbers in a graph

the answer is 15% decrease

∠cbe and ∠deb are same-side interior angles.

i took the test

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81