Which equation is in slope-intercept form and represents a line with slope 0 thr

Algebra
Tutor: None Selected Time limit: 1 Day

30. An empty 6-gal water jug weighs 0.5 lb. With 3 c of water inside, the jug weighs 2 lb. Which equation models the jug’s weight y when it contains x cups of water? 
 
A.y=0.5x-0.5
B.y=-0.5x+0.5
C.y=0.5x+0.5
D.y=-0.5x-0.5
31. What is the slope for the equation -1/2x-y=3/4
 
A.3/4
B.-3/4
C.1/2
D.-1/2

33. Which direction would the graph of y=-lx+2l+3 open?
 
A.right
B.down
C.left
D.up
34. Which equation is in slope-intercept form and represents a line with slope 0 through the point (2, 3)?
 
A. y=3
B.x=2
C.y=x+3
Dy=x+2
May 12th, 2015

30; the answer is C  (plug 3 in and you get the 2 pound weight)

31; the answer is D (solve for y:  y = 1/2 x + 3/4)

33; the answer is B (the negative in front of the absolute value flips the "V" of the graph upside down.)

34; the answer is A (horizontal lines have slopes of zero.  y = 3 is horizontal and passes through 2,3)

Hope that helps!

May 12th, 2015

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May 12th, 2015
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