A cable company charges $75 for installation plus $20 per month. Another cable company offers free installation but charges $35
per month. For how many months of cable service would the total cost from either company be the same?
Explain and write down how you found it
Explain and write down how you found it
1 answer:
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Answer:
y = - x - 1
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (5, - 4) and (x₂, y₂ ) = (0, - 1) ← 2 points on the line
m = =
= -
Note the line crosses the y- axis at (0, - 1) ⇒ c = - 1
y = - x - 1 ← equation in slope- intercept form
