Calculate Slopes (convert equation)
Write an equation in Slope-Intercept
Evaluate Functions
Constant Variation
Scatter Plots
100
(0, 0) and (10, 0)
0
100
m = -6
b = 9
y = -6x + 9
100
Evaluate when x=-2;
-6x+10
22
100
Y varies with x, determine the variation equation.
y=14, x=2
y=7x
100
What type of correlation happens when y increases as x increases?
Positive Correlation
200
(-2, 5) and (8, 1)
-4/10 or -2/5
200
m = -6/7
b = 3/2
y = -6/7x + 3/2
200
Evaluate when x=-1/2;
6x-1
-4
200
Y varies with x, determine the variation equation.
y=5, x=10
y=0.5x
200
What type of correlation happens when y decreases as x increases?
Negative Correlation
300
(2,3) and (9,7)
4/7
300
m = -4
Point: (1, 3)
y=-4x+7
300
Evaluate when x=11;
17+x-2x
6
300
Y varies with x, determine the variation equation.
y=42, x=3
y=14x
300
What kind of correlation occurs?
Positive
400
(5, 7) and (3, 6)
1/2
400
m = 0
b = 4
y = 4
400
Is the function linear?
4x+10
Yes
400
Y varies with x, determine the variation y-value when x=-3.
y=18, x=9
k=2, thus y=-6
400
How much would it cost for a turkey with a weight of 60lbs?
About $80-100
500
Convert the equation into Slope-Intercept:
8x-2y=30
y=4x-15
500
m = 1/2
Point: (-6, 2)
y=1/2x+5
500
Is the function linear?
3x^2+5
No, the exponent is not linear
500
Y varies with x, determine the variation y-value when x=7.
y=15, x=3
k=5, thus y=35
500
How much would a turkey weigh if you spent $40?
About 30lbs