41,546 views
21 votes
21 votes
Please answer number 2 I think I answer is A but please explain how you got your answer.

Please answer number 2 I think I answer is A but please explain how you got your answer-example-1
User Reimundo Heluani
by
2.7k points

1 Answer

9 votes
9 votes
Answer is A. 60 laps

Step by step

She needs $80
She makes .75 per length she swims
She gets a one time $35 for the swim

We can use y intercept formula y=mx+b

$80 is your output or y
.75 is your rate
x is your unknown
b is your one time number that doesn’t change, on a graph it would be the y intercept or starting point

$80 = .75x + 35
Subtract 35 from both sides to isolate x
80 - 35 = .75x +35 -35

45 = .75x

Divide both sides by .75 to solve for x

45/.75 = .75/.75 x

60 = x
User AlexV
by
3.2k points