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Finding Slope
Intercepts
Types of Slope
Finding Equations
Graphing
100
The slope-intercept form of 2x + 3y = 12.
A. y = 3/2 x + 4 B. y = -3/2 x + 4
C. y = 2/3 x + 4 D. y = -2/3 x + 4
D. y = -2/3 x + 4 What is D?
100
The slope of the equation y = -3x + 5.
A. 3 B. -3
C. 5 D. -5
B. -3
100
The y-intercept of the equation y = 7x - 5
A. 7 B. -7
C. 5 D. -5
D. -5
100
The slope of line that goes downhill from left to right
What is negative?
100
SLOPE - INTERCEPT FORM
The equation that represents the line containing the points (8, -3) and (0, 5) is
What is y = -x + 5?
m = (5-(-3))/(0-8) = (5+3)/(-8) = 8/-8 = -1
given (0,5) y intercept "b" = 5 since x =0
so, substitute "m" and "b" into y=mx+b
y = (-1)x + 5 or y = -x + 5
100
FIND SLOPE
what is - 1
200
The slope-intercept form of 5x + 3y = -15.
A. y = -3/5 x - 5 B. y = 3/5 x - 5
C. y = -5/3 x - 5 D. y = 5/3 x - 5
C. y = -5/3 x - 5
200
The slope of the equation y = 1/2x + 7.
A. 7 B. -7
C. 1/2 D. -1/2
C. 1/2
200
The x-intercept of the equation 3x - 8y = 24.
A. 3 B. -3
C. 8 D. -8
C. 8
Set y = 0 to find "x"
3x - 8(0) = 24 so 3x = 24 .
then divide both sides by 3 . 3x/3 = 24/3
x = 8
200
The slope of a line that goes uphill from left to right is
What is positive
200
The equation that represents the line containing the points (3, -3) and (2, 5) is
What is y = -8x + 21?
STEP 1: solve for m = -8
STEP 2: substitute x,y,m into y=mx+b to find b
5=-8(2) + b so b = 21
so y = -8x + 21
200
Y-Intercept "b" = 3
Slope "m" = +1
300
The slope-intercept form of 6x - 3y = -18.
A. y = -2x + 6 B. y = 2x + 6
C. y = -2x - 6 D. y = 2x - 6
B. y = 2x + 6
300
The slope of the equation containing the points (2, 5) and (4, 3).
A. 1 B. -1
C. 3 D. 1/3
B. -1
m = -2/2 = -1
300
The y-intercept of the equation 2x - 8y = 4
A. 1/2 B. -1/2
C. 2 D. -2
B. -1/2
300
The slope of a vertical line is
What is undefined?
300
The equation that represents the line containing the points (4, 2) and (0, 6) is
What is y = -x + 6?
300
y=-2x + 6
400
The slope-intercept form of 3x - y = -15?
A. y = -3x + 15 B. y = 3x + 15
C. y = -3x - 15 D. y = 3x - 15
B. y = 3x + 15
400
The slope of the line containing the points (6, 4) and (10, 2).
A. 4 B. -4
C. 1/2 D. -1/2
D. -1/2
Make Mini Table
400
The y-intercept of the equation -5x + y = -17.
A. 17 B. -17
C. 3 D. -3
B. -17
substitute 0 for x and solve
y+2 = 3(zero - 5)
y+2 = -15 then subtract 2 from both sides
y = -17 . the coordinate is (0,-17)
400
The slope of a horizontal line is
What is zero?
400
What is the equation of lines that has a y-intercept of -2 and pass through the point (2,-22)
What is y = -10x - 2?
WATCH NEGATIVE SIGNS
400
y = 6
500
The slope-intercept form of y - 3 = 5(x - 1)?
A. y = 5x + 2 B. y = -5x + 2
C. y = 5x - 2 D. y = -5x - 2
C. y = 5x - 2
500
The slope of the line represented by the equation
3y +x = 9
A. 1/3 B. -1/3
C. 7 D. -7
B. -1/3
500
The x-intercept of the equation y = 3x - 9
What is 3?
set y = 0 and solve
0 = 3x - 9 . then add 9 to both sides
3x = 9 divide both sides by 3 . 3x/3 = 9/3
x = 3 coordinate point is (3,0)
500
The slope of the line containing the points (3, 9) and (3, 5) is
What is undefined?
500
Write the equation of line that has an x-intercept of 3 and a y-intercept of 5?
Remember x-intercept of 3 means (3,0)
Y-intercept of 5 means b = 5 and (0,5). Find the slope between your two points.
Answer is what is y= (5/3)x + 5
500
Who are your two best friends?
who are m (slope) and b (y-intercept)?