Hi there!
To find the amount of money needed for one class, we need to plug 1 into the equation as x, since x represents the amount of classes.
y = 40(1) - 25
y = 40 - 25
y = 15
So, it would cost 15 dollars.
Hope this helps!
Answer:
- domain: (-4, ∞)
- range: [-4, ∞)
Step-by-step explanation:
The domain is the horizontal extent of the function. This function is defined for all values of x greater than (but not including) -4. Its domain is (-4, ∞).
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The range is the vertical extent of the function. This function gives output values of any number greater than or equal to -4. Its range is [-4, ∞).
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Interval notation uses square brackets when the value is included in the interval. It uses round brackets (parentheses) when the end value is not included in the interval. ∞ is not a number, so that end always gets a round bracket.
8.88 I think. Hope this helps :)
