Where is the vertex of the parabola?

y = x2 + 2x + 3

above the x-axis

below the x-axis

on the x-axis

on the y-axis

what are the x-intercepts of the quadratic function?

y = x2 – x – 2

2 and 1

–2 and 1

2 and –1

1

Blank × 10-3 is 2,000 times greater than 1.9 × 10-6. it is also blank times greater than 9.5 × 10-4.

What is the value of x in the diagram below?

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.