The numerical coefficient of x2 in the expression x3 – 7x2 + 8x + 4 is
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Answer:
The numerical coefficient of x2 in the expression x3 – 7x2 + 8x + 4 is
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Step-by-step explanation:
A coefficient is a multiplier. A constant is a number.
In 3x^2 -5x + 2,
3 and -5 are coefficients. Some might say that the 2 is the coefficient of x^0, if it makes talking about a pattern easier. 3, -5 and 2 are all (numerical) constants.
In statistical modeling, we often have expressions like y^ = B0 + B1 x1 + B2 x2.
Here B0, B1, and B2 are constants determined by the data. If B2 = 0, then we have a line, for linear regression, and B1 represents the slope of the line, while B0 represents the y-intercept: the y value when x1 = 0. If B1 and B2 are not zero, that is multiple linear regression. B1 is the slope in the x1 direction (with constant x2) and B2 is the slope in the x2 direction (holding x1 constant.)