Presented are activities which use data from an instrument which combines speedometer, odometer, and clock readings on a circular graph. Applications of linear graphs using actual and simulated tachographs are discussed. Examples of student work are given. (CW)

Graphing calculators convert an equation to a visual model allowing students to make connections between mathematical concepts. Teachers are very receptive to the calculators, according to the director of the Calculator and Computer Precalculus Project at Ohio State University. (MLF)

Explores whether the differences in use of terminology were related to respective fields or to idiosyncratic characteristics of experience and education. Reports differences among college teachers, high school teachers, and college students from a 16-item survey on algebraic and graphing terminology used in mathematics and science. (YP)

Describes a five-step graphing method for various trigonometric periodic functions. Emphases is on teaching constants and functions. (YP)

Discusses solving inequality problems involving linear programing. Describes the usual and alternative approaches. Presents an intuitive approach for finding a feasible solution by maximizing the objective function. (YP)

Presents examples of line and curve graphs. Suggests some ways of using graphs to increase student learning. (YP)

Negotiations proposals can be evaluated by assigning advantage points and plotting these values on a negotiations analysis graph. Provided to illustrate the procedure are a table containing all proposal items submitted by both bargaining teams showing advantage point evaluations; four figures, each with four graphs, are also included. (MLF)

Canonical analysis of two convex polyhedral cones involves looking for two vectors whose square cosine is a maximum. New results about the properties of the optimal solution to this problem are presented. The convergence of an alternating least squares algorithm and properties of limits of calculated sequences are discussed. (SLD)

Simple experiences with probability can extend third graders' understanding of the need for fractions. Three activities are given which build on language-arts experiences and incorporate concepts in multiplication, graphs, and fractions. (MNS)

The form of item log-likelihood surface was investigated under two-parameter and three-parameter logistic models. Results confirm that the LOGIST program procedures used to locate the maximum of the likelihood functions are consistent with the form of the item log-likelihood surface. (SLD)

Reviews studies in which perceptual cue trading data have been compared with computational models and examines the perception of contrast between the voiceless fricative "s" and the voiceless affricate "ts." Nine subjects listened to a total of 6 tokens each of 193 stimuli and labeled each stimulus as containing either of the…

Describes data analysis activities for grades three through six using unshelled peanuts. Includes two reproducible student worksheets. (MKR)

Describes exploratory data analysis activities using packages of M&M candies and graphing results using object graphs, picture graphs, symbolic graphs, circle graphs, relative-frequency bar graphs, and stacked bar graphs. Also discusses pooling data and assessing reasonableness of results. (MKR)

Quick power estimates for detecting a difference in two population proportions are expedient during early stages of research planning. Such estimates are tabled and graphed in this article. They are shown to be conservative but accurate for most research situations when proportions fall in the range of 0.25 to 0.75. (SLD)