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Is the direct variation of two variables always a linear function?
YES...A direct variation is a linear relationship in which y-intercept is always 0.
Can slope k of a direct variation be positive?
The slope of the graph of a direct variation is always positive.
Does y equal 1X show direct variation?
Yes. y = 1x is the same as y = x which is the simplest case of direct variation. If you consider the equation y = mx + b, then a direct variation will always have b = 0 (i.e. the graph goes through the origin). The value of m is called the "constant of variation", and the equation is usually written as y = kx.
What type of graph has direct variation?
The statement "y varies directly as x," means that when x increases, y increases by the same factor. In other words, y and x always have the same ratio where k is the constant of variation.
What do you mean when you say that the coefficient of variation has no units?
Suppose the mean of a sample is 1.72 metres, and the standard deviation of the sample is 3.44 metres. (Notice that the sample mean and the standard deviation will always have the same units.) Then the coefficient of variation will be 1.72 metres / 3.44 metres = 0.5. The units in the mean and standard deviation 'cancel out'-always.
Which describes an advantage of sexual reproduction?
Genetic variation
What is an advantage of using the range as a measure of variation?
It is simple to calculate.
What does neutral variation mean?
Genetic diversity that confers no apparent selective advantage.
What is the advantage and disadvantage of variation order?
Takes Time and incurs more cost
Is the direct variation of two variables always a linear function?
YES...A direct variation is a linear relationship in which y-intercept is always 0.
Can slope k of a direct variation be positive?
The slope of the graph of a direct variation is always positive.
Is a linear relationship always a direct variation?
No.
Does the graph of an inverse variation pass through the origin?
Inverse variation does not pass through the origin, however direct variation always passes through the origin.
In a direct or joint variation problem is the variable always in the numerator?
yes
How do you know if the equation is a direct variation?
When two variables are related in such a way that the ratio of their values always remains the same, the two variables are said to be in direct variation. y=2x is direct variation y=x+2 is not direct variation
How long does the DNA remain in the sperm?
DNA always remains in the sperm, that is how variation happens.
Does the graph of a direct variation pass through the origin?
yes, a graph of a direct variation must pass through the origin because direct variation is always in form of y=mx where x and y are variables and m is a constant.
