Tara takes her pulse in order to determine her resting heart rate, measured in beats per minute (bpm). She takes it for three minutes, and makes the following chart of the results. We'll assume that Tara's heart rate
is constant over the three-minute period.
Minutes
1
2
3
Beats
60
120
180
Graph the proportional relationship described above, where the coordinate represents minutes and the
y-coordinate represents beats.
y
90
80
70-
60+

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 : )

Do you have answers choice but i think the answer is 18 because 2/3 times 18 =12 serving hope this can i have brinlyest