**3.**line a smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line**5.**coefficient when the regression line is linear (y = ax + b) the regression coefficient is the constant (a) that represents the rate of change of one variable (y) as a function of changes in the other (x); it is the slope of the regression line**7.**deviation the square root of the variance**9.**drafting instrument used to draw or measure angles**10.**interest interest calculated on both the principal and the accrued interest**13.**the quality of being valid and rigorous**14.**a variable quantity that cannot be resolved into components**15.**a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point**16.**extending or lying across; in a crosswise direction; at right angles to the long axis**17.**the people who inhabit a territory or state**22.**having the character of a polynomial**23.**circuit a circuit having its parts connected serially**24.**value the sum of the values of a random variable divided by the number of values**25.**curve a symmetrical curve representing the normal distribution**26.**a mathematical notation indicating the number of times a quantity is multiplied by itself**27.**a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)**29.**a limited period of time

**1.**a straight line segment whose length is magnitude and whose orientation in space is direction**2.**of or in or along or relating to a line; involving a single dimension**3.**concerning each of two or more persons or things; especially given or done in return**4.**a datum that can be represented numerically**5.**scale a logarithmic scale of 1 to 10 formerly used to express the magnitude of an earthquake on the basis of the size of seismograph oscillations**6.**distance travelled per unit time**8.**the source or origin from which something derives (i.e. comes or issues)**11.**the amount per unit size**12.**complete change in character or condition**17.**maintain or assert**18.**a constant in the equation of a curve that can be varied to yield a family of similar curves**19.**the quality of being subject to variation**20.**ratio of the adjacent side to the hypotenuse of a right-angled triangle**21.**an idea accepted as a demonstrable truth**28.**ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle