there is an equation for straight lines which goes
y-y,=m(x-x,)
where( x, , y, ) is any coordinate on the line and m is the gradient
so your answer is
y-7= -2(x-4)
does this make sense?
Answer: 14.4 h
The speed is : 
The time it takes to travel 279 miles :
Answer: negative 0.7
Step-by-step explanation:because you are looking for the opposite if you make a number line
frankly yes, because when you want inverse a function you must inverse it with line x=y
so when you inverse a function Df and Rf will convert together!
