The linear rule should look like this y=a*x+b
As the function graph goes through the (0,0) point, the equation 0=a*0+b <=> b=0 must be true.
Now we only need to find a, using one of the points given. With (-4, 16):
16=-4*a <=> a=16/-4 <=> a= -4
So the rule looks the following way:
f(x)= -4*x
Depends on MPH or Miles Per Hour.
Going 10 mph = 30 minutes
Going 50 mph = 10 minutes
Etc.
You find a common denominator (the bottom one) and then add the numerator (the top) but you don't add the denominator, you just make it the same
The question is asking which of the following does not have side that are parallel. So which of them have lines that would never touch if they were never ending lines.
