What is the best interpretation
of the slope of the line?

A student's test score is likely to
increase about 20 points for each
hour spent studying.
Mr. Crawford's 4th-Period
Math Class

A student's test score is likely to
decrease about 1 point for every
30 minutes spent studying.
Test Scores

A student's test score is likely to
increase about 1 point for every
20 minutes spent studying.

A student's test score is likely to
decrease about 20 points for each
hour spent studying.

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )