What is the Equation for this graph?

For a straight line: y=ax+b

x=0, y=3:

3=a×0+b, b=3

x=5, y=0

a×5+3=0, a=-3/5=-0.6

y=-0.6x+3

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles