In the equation of a straight line (when the equation is written as  y = mx + b ), the slope is the number  m  that is multiplied on the x, and  b  is the y-intercept, where the line crosses the y-axis.
A+E Networks. On this day in 1904, Theodor Geisel, better known to the world as Dr. Seuss, the author and illustrator of such beloved childrenâs books as âThe Cat in the Hatâ and âGreen Eggs and Ham,â is born in Springfield, Massachusetts.
March 2: Dr. Seuss Born in 1904. Author and illustrator Theodor Geisel, who gained fame under the pseudonym Dr. Seuss, holds a copy of his book, The Cat in the Hat,  in his home in La Jolla, Calif., in this April 25, 1957 photo.