Mathematics the Bob Jones Way
Precalculus for Christian Schools, from Bob Jones University Press, looks like a gas. Some excerpts:
A line can be described either by its slope (a ratio) or by its inclination (an angle). These terms describe the deviation from the horizontal, but the word inclination also has a non-mathematical meaning. Without Christ, man is inclined to sin. The Word of God should shape our attitudes (inclinations).
A person is eccentric if his behavior deviates from normal. Jesus Christ expects His disciples to be eccentric, since living a Christlike life is not normal in this world (Titus 2:14). Likewise, in mathematics, conic sections are eccentric if they deviate from a circle. Eccentricity is a measure of this deviation. The eccentricity of an ellipse (e) is the ratio of focal distance (c) to the length of the sentimajor axis (a): e = c/a. Since c and a are distances and c < a, the eccentricity of any ellipse is 0 < e < 1.
Talk about a one-track mind; Which, I suppose, is the Bob Jones way.