Final answer:
Mr. Lafferty's score would be -250 points after incorrectly answering questions worth 50 points five times in Jeopardy, as his score decreases by the point value of the questions answered incorrectly.
Step-by-step explanation:
Mr. Lafferty's score in Jeopardy after incorrectly answering questions worth 50 points five times would be calculated by multiplying the point value of each question by the number of incorrect answers. Since points are deducted for incorrect answers in Jeopardy, we multiply 50 (point value) by 5 (number of incorrect answers), which equals 250 points.
However, since these points are deducted, Mr. Lafferty's score would then be -250 points. So, if he started at zero, his current score after the incorrect answers would be negative two hundred and fifty points.