It is the second bubble because there can only be one x per y. For example, (1,3) and (1,4) isn't a function because the x which is 1 has too many y
Answer:
Step-by-step explanation:
y₂₋y₁ / x₂-x₁ if you have two points you can plug them in and find the slope using this.
If it is on a graph you can look at two points and count the rise over run, for example if one point is (0, 0) and another is (2, 3) then from the first point it goes up 2 and over 3, so the slope would be 2/3
f(x)=4x
To find the inverse, first change f(x) to y:
y = 4x
Now switch the variables:
x = 4y
Solve for Y:
Divide both sides by 4:
y = x/4
Now replace y with the inverse function f^-1(x):
f^-1(x) = x/4
Answer:
12.50 - 3.75 = 8.75
$8.75 / $1.25 * (1/2) (per mile) = 3.5 miles
1. Mile .5 (fee and 1st mile)
$3.75 + $1.25 = $5.00
2. Miles .5 - 3.5 (additional 3 miles)
$1.25 * (3*2) = $7.50
Total: $5.00 + 7.50 = $12.50
Step-by-step explanation: