Slope (m) =
=
=
= -3
y - y₁ = m(x - x₁) ; where (x₁, y₁) is the point and m is the slope
y - 15 = -3(x + 2)
y - 15 = -3x - 6
y = -3x + 9
Hour one:
Eastbound train- 65 mi
Westbound train- 85 mi
150 miles apart
Hour two:
Eastbound train- 130 mi
Westbound train- 170 mi
300 miles apart
Eastbound train travels 32.5 miles in 30 min, Westbound train travels 42.5 miles in 30 min
Two and a half hours:
Eastbound train- 162.5 mi
Westbound train- 212.5 mi
Answer:
Martin's graph shows a proportional relationship because Isabelle had to pay 3 extra dollars.
Step-by-step explanation:
Martin's equation y=5x
Isabelle's equation y=5x+3
I put a picture of the lines graphed on the graph.
I hope this helps and have a great day.