1/5 discount = 4/5 price of washing machine
4/5 × 1200 = $960
Let's solve the next equation:

We need to find the value for c, this value is correct when we replaced it with a number and the equality equation becomes true.
First, subtract both sides by 6


Now, subtract both sides by 8


Replacing the c value to verify:


The c value is correct.
Answer:
m=1/7
Step-by-step explanation:
Labeled the points and used Slope of a line formula.