Math please.
posted by Walt .
What is the yintercept of y =
2/3x + 2?
I have to write it out but how?
A line has a slope of
1/2 and passes through the point (0,5). What is the equation of the line?
A)y = 1/2x + 5
B)y = 1/2x  5<
C)y = 5x + 1/2
D)y = 5x + 1/2
Find an equation of the line that passes through the points (1,2) and (2,3).
A) y = x  1
B) y = x + 1
C) y = x  2 <
D) y = 2x  1
8)Find an equation of the line that has intercepts (1,0) and (0,4).
A) y = 4x  1 <
B) y = 4x + 4
C) y = 4x + 1
D) y = 4x  4
9)A line passes through the point (2, 3) and has a slope of 2. Which is the equation of the line in pointslope form?
A) 2x + y = 7
B) y = 2x + 7
C) y  3 = 2(x  2)<
D) y = 1/2x + 5

1. is 2?

The probability of guessing them all wrong would be (3/4)^5 = .24
You managed to get the all wrong
1. In the form y = mx + b
the yintercept is b
in the equation y = (2/3)x + 2, what do you see in place of the b ?
2. isn't (0,5) the yintercept ?
so b = 5
which equation has 1/2 in front of the x and a 5 instead of the b ?
3. I subbed (1,2) into your choice and it did not work, no point trying the 2nd point.
Look at the points, in each case the y is 1 more than the x
Look at y = x+1
To me that says, the y is 1 more than the x
4.
Again isn't (0,4) the yintercept?
So which equation has +4 at the end ?
5.
Only B and D are in slope  yintercept form, ruling out A and C
Which of B and D has a slope of 2 ?
Sub in (2,3) in your choice to make sure 
1. +2
2. y = 1/2x + 5 .. I had 5
3. y = x + 1
4. y = 4x + 4.
5. y = 2x + 7
thanks !
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