Question 71478
If x varies directly as y and x is 25 when y is 5, find the constant of variation.
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If x varies directly as y, y=kx where k is the constant of variation.
Find k.
If x is 25 when y is 5 the solve for "k": 5=k*25; k=1/5
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Which of the following relations is NOT a function? 
 (2,1), (1,-2), (-3,2), (2,-3) 
 (2,-1), (-1,2), (-2,3), (3,-2) 
 (-3,-2), (-1,0), (0,1), (1,2) 
 (-2,1), (-1,2), (1,1), (2,3)
They are all functions because each x value has one y value associated with it.
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This equation, 6x + 3y = 15, crosses the y axis at ______.
You want the y-intercept.
Let x=0, then 6*0+3y+15; 3y=15; y=5
That is the y-intercept.
The line crosses the y-axis at (0,5)
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The sum of three consecutive ODD integers is 75. 
Write the equation you would use to find these integers.
Every odd integer is one more than an even integer.
Every even integer is a multiple of 2.
so every even integer can be written as 2x.
Therefore every odd integer can be written as 2x+1.
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EQUATION: 
(2x+1) + (2x+3) + (2x+5) = 75
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Cheers,
Stan H.