1. 15x
2. 21
3. 4
You’re welcome
Answer:
y = 5
Step-by-step explanation:
A line with a slope of zero is a horizontal line parallel to the x- axis.
The equation of a horizontal line is
y = c
where c is the value of the y- coordinates the line passes through
The line passes through (2, 5) with y- coordinate 5, thus
y = 5 ← equation of line
Say the tip is 11% of the bill. That's 0.11 times the amount of the bill.
Let b = amount of the total bill
Let T = amount of the tip
An equation that describes the situation is
T(b) = 0.11b,
where T is the amount of the tip and b is the amount of the bill.
This equation represents a function. It determines T as a function of b (because the equation is solved for T, and only b appears on the right side).
