Answer:
Step-by-step explanation:
y = k*x This is the formula for a direct variation.
- y = 20
- x = 4 Substitute these values into the direct variation
20 = 4 * k Divide by 4
20/4 = 4k/4
k = 5
Answer: the constant of variation is 5
Answer:
5 months
Step-by-step explanation:
Given


Required [Missing from the question]
At what month will the cost be equal
To do this, we equate both expressions

This gives:

Collect like terms


Solve for m


Answer:
Y=x + 7
slope = 1, the coefficient of the x term, an implicit one
plug the point y=4, x=-3 into the equation, 4=-3+7 = 4, it passes through the point (-3,4)
Step-by-step explanation:
hope it help