Unit 1

Question 1

What is the correlation coefficient formula?

Answer 1

r= n(Exy)-(Ex)(Ey) / square root n(Ex^2)-(Ex)^2 • square root n(Ey^2)-(Ey)^2

Question 2

What is the equation for finding the slope of a least squares line?

Answer 2

M= n(Exy)-(Ex)(Ey) / n(Ex^2)-(Ex)^2

Question 3

What is the equation for finding the y intercept of a least squares line?

Answer 3

B= Ey-m(Ex) / n

Question 4

What are the three rules for finding horizontal asymptote?

Answer 4

• if numerator is less than denominator degree, y=0
• if numerator is equal to denominator degree, y= a/b
• if numerator is greater than denominator degree, there is no asymptote

Question 5

How do you find the slope of a line when given two points?

Answer 5

M= y2-y1/ x2-x1

Question 6

What is the point slope form of an equation line?

Answer 6

y-y1=m(x-x1)

Question 7

What is slope intercept form of the equation line?

Answer 7

y=mx+b

Question 8

How do you find the slip of a line when you have a perpendicular lines slope?

Answer 8

It is the negative inverse
Slope=5
Slope= -1/5

Question 9

What is the coefficient of determination?

Answer 9

R

R=r^2

Question 10

What is the least squares line?

Answer 10

Y=mx+b

Question 11

What is the formula for finding the vertex (h, k)

Answer 11

h=-b/2a

k=c-ah^2

Question 12

How do you complete the square to get vertex point form?

Answer 12

Take ax^2 +bx+c
Take a out 
A(x^2+(b/a)x) + c
a(x^2 + (b/a)x + (b/a)^2) + c - (a(b/a)^2)
a(x+square root (b/a))^2 + ^

Question 13

How do you find the turning points in a polynomial?

Answer 13

N-1

The degree minus 1

Question 14

How are the degrees different for proper rationals and improper rationals?

Answer 14

Rational- p(x)/q(x)

Proper- degree p < degree q
Improper- degree p > or equal to degree q

Question 15

How can improper rationals be re written to find horizontal asymptote?

Answer 15

P(x)/q(x) = s(x) + t(x)/q(x)

2x2+3
X2-1 = 2+ 5/x2-1

Because you long divide x2-1 into 2x2+3