Answer:

Step-by-step explanation:
to find the slope use the formula 

simplify


move the negative in front of the fraction

(2x+3x) (3y+(-4y))
(5x) (-1)
5x-1
Answer:
The length if the model is 6.875 inches.
Step-by-step explanation:
1.5 inches - > 3 feet is the same as 1 inch - > 2 feet (Same ratios: 3/1.5 = 2/1)
So since this is a linear relation between values we can use the rule of three.
1 inch(model) - > 2 feet(actual object)
x inches (model) - > 13.75 feet (car)
We cross-multiply:
1*13.75=2*x - > x= 13.75/2=6.875 inches
Refer to the photo taken.