Slope & y-intercept
Identify the SLOPE and the YINTERCEPT
(remember the y-int should be written as an ordered pair)
y = 5x - 9
m = 5
y-int: (0, -9)
Calculate the SLOPE. Show your work.
(0, 5) (3, -4)
m = (-4 - 5) / (3-0) = -9/3 = -3
Use y=mx+b to Calculate the Y-INTERCEPT
m = 2 (5, 13)
13 = 2(5) + b
13 = 10 + b
3 = b
(0, 3)
Convert to Slope-Intercept Form
3x + 3y = 15
3y = -3x + 15
y = -1x + 5
What is the fourth planet from the sun?
Mars
(Mercury, Venus, Earth, Mars)
Identify the SLOPE and Y-INTERCEPT
(yint should be written as an ordered pair)
y = x + 4
m = 1
y-int: (0, 4)
Calculate the SLOPE. Show your work.
(17, -15) (2, -5)
(-5--15) / (2-17) = 10/15 = 2/3
Use y=mx+b to Calculate the Y-INTERCEPT
m = -3 (12, 9)
9 = -3(12) + b
9 = -36 + b
45 = b (0, 45)
Convert to Slope Intercept Form
5y + 4x = -35
5y = -4x - 35
y = -4/5x - 7
Chainsaws were first invented for...?
A. Food Cutting
B. Wood
C. Childbirth
C. Childbirth - it was used in the late 18th century to widen the birthing canal and rid the body of any diseased bones. It wasn't used for wood cutting till the 20th century.
Identify the SLOPE and Y-INTERCEPT
(y-int should be written as an ordered pair)
y = -8x
m = -8
y-int: (0, 0)
Calculate the SLOPE. Show your work.
(1, 2) (-7, 10)
(10-2) / (-7-1) = 8 / -8 = -1
Use y=mx+b to Calculate the Y-INTERCEPT
m = 1/5 (15, -21)
-21 = 1/5(15) + b
-21 = 3 + b
-24 = b (0, -24)
Convert to Slope Intercept Form
y + 8 = 10(x - 7)
y + 8 = 10x - 70
y = 10x - 78
Flamingos are born with gray-ish feathers, what makes them turn pink?
They eat shrimp and algae
A. Identify the SLOPE & Y-INTERCEPT
(y-int as an ordered pair)
y = -2
B. What kind of the line will this be?
m = 0
y-int: (0, -2)
Horizontal Line
Calculate the SLOPE. Show your work.
(14, 20) (1, 46)
(46-20) / (1-14) = 26 / -13 = -2
Use y=mx+b to Calculate the Y-INTERCEPT
m = -3/4 (-16, 34)
34 = -3/4(-16) + b
34 = 12 + b
22 = b (0, 22)
Convert to Slope Intercept Form
y - 11 = 1/3(x + 21)
y - 11 = 1/3x + 7
y = 1/3x + 18
Name 3 states that start with the letter M
(do your best with spelling, no abbreviations)
Michigan, Missouri, Minnesota, Montana, Mississippi, Massachusetts, Maine
A. Identify the SLOPE & Y-INTERCEPT
x = 6
B. What kind of the line will this be?
m = undefined
y-int: NONE
x-int: (6, 0)
Vertical Line
Calculate the SLOPE. Show your work.
(-17, -5) (-5, 35)
(35- -5) / (-5- -17) = 40 / 12 = 10/3
Use y=mx+b to Calculate the Y-INTERCEPT
m = 9 (-8, -72)
-72 = 9(-8) + b
-72 = -72 + b
0 = b (0, 0)
Convert to Slope Intercept Form
-7x - 21y = 42
-21y = 7x + 42
y = -1/3x - 2
What animal is more likely to get hit by lightening than humans?
Giraffes - when lightening hits the ground it travels up their long legs.