The rate of change is the change in Y over the change in X.
Rate of change = (-5 - 0) / (-2 - -3)
Rate of change = (-5 ) / (-2+3)
Rate of change = -5 /1
Rate of change = -5
Answer:

Step-by-step explanation:
The expression has been given as:

Required: Find 
Simplify the fraction

Take arc tan of both sides


20 watches are made according to the cost of 385 dollars
Answer:
y= 0.5x -2
Step-by-step explanation:
gradient = 2 ÷ 4 = 0.5
y intercept is -2
so... equation of line is y = 0.5x - 2