4.27 Predicting gas usage In Example 4.7 (page 170), we examined the relationship between the average monthly temperature and the amount of natura gas consumed in Joan's midwestern home. The equation of the ieast-squares line shown in Figure 4.18 is y = 1425 - 19.87x. (a) Identify the slope of the line and explain what it means in this setting (b) Identify the y intercept of the line and explain what it means in this setting (c) Use the regression line to predict the amount of natural gas Joan will use ins month with an average temperature of 30°F. %3D

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Vertices Of An Ellipse

In the study of the conic section of the geometry, An ellipse is a plane curve surrounding two focal points, or foci where the set of all locus of points in the plane has their sum of the distances to the two foci is constant. On the ellipse curve, it is the intersection point of the main axis. In an ellipse graph, the center of the axis is the midpoint of the line segment connecting the foci. The major axis is the line section that runs through the ellipse's foci, while the minor axis runs through the middle and is perpendicular to the major axis.. The ellipse has two endpoints on the major axis which are known as the vertices (in plural), vertex in the singular. The equation of the major axis is 2a, the equation of the minor is 2b and the distance between the major axis and minor axis is 2c. The semi-major axis has a length of a and the semi-minor axis has a length of b. The ellipse's vertices are determined by the elliptical orbit's equation and graph.