Mat

Mini Murder Mystery Straight line graphs

Discussion 1:

· Only ONE initial response is allowed.

· Must respond by due date to one fellow student’s posting in order to earn all potential points. (Posting must be relevant and not just yes I agree or disagree).

· Points – See Discussion Value

One of the following 6 people has murdered one of the others.

Each has made 4 statements about these 2 graphs.

The murderer has made 3 errors, the victim made 0 errors.

The other suspects made 1 or 2 errors

Claire says

· Line 1 is steeper than line 3

· Slope of line 3 is 0.5

· (1,0) is on line 3

· (2,3) is on line 1

Lucy says

· The slope of line 4 is 1

· The slope of line 2 is -1

· The y intercept of Line 3 is 1

· (4,3) would be on line 3

Duncan says

· Lines 1 & 2 are perpendicular

· The slope of line 4 is 3

· (0, -1) is on line 1

· Line 3 is steeper than line 4

Jack says

· The slope of line 2 is -1

· (0,2) and (2,0) are both on line 2

· (2,5) is on line 4

· The slope of line 3 is 2

Josh says

· Slope of line 1 is 2

· (-2,1) is on line 4

· (0,-3) is on line 4

· (-1,-4) is on lines 3 & 4

Ashley says

· Line 4 would be parallel to y = x

· (0.5,0) is on line 1

· (4,-2) is on line 2

· Slope of line 3 is 2

Accusation,,________________________ murdered ______________________

Where

The murder took place at the coordinates described by the following.

Draw the line and think about coordinates on the line.

Mark your answer with a large “x”

· It is on the line y = 2x - 5

· The y coordinate is less than the x coordinate

· The sum of the coordinates is 8.5

Show work:

a= slope of y=2x-1 g= slope of y=x-1

b= slope of y=4x+y =-9 h= slope of 3x+y=2

c= slope of y=5x+6 i= slope of y= 6x-7

d= slope of y=3x+1 j= slope of

e= slope of x+4y

f= slope of y=0.6xy+20x-20