Determine the slope of a line passing through the given points. If the slope is undefined, write undefined. Enter your answer as a decimal if necessary. a. ( 5 , − 4 ) and ( 0 , 1 ) b. ( − 1 , 8 ) and ( 7 , 10 ) c. ( − 4 , 12 ) and ( − 4 , 5 ) Tools are not currently accessible