On the interval {{MATH_182}} the acceleration {{CMD_183}} {{CMD_184}}is positive.{{CMD_185}} {{CMD_186}}is negative.{{CMD_187}} {{CMD_188}}is zero.{{CMD_189}} {{CMD_190}}assumes both positive and negative values.{{CMD_191}} {{CMD_192}}inconclusive, since from the graph of s we cannot conclude anything about acceleration. {{CMD_193}} {{CMD_194}} {{CMD_195}}