PLZ HELP FAST shsggsgsgsbdfikand

x    y-values

1    175

2   175

3   225

4    275

The domain is 1,2,3,4  it would be from 1 to 4 if the electrician bills for partial hours, or greater than 4, but this is not in the chart.

The range is 175,225,275.  Again there could be other values in between or greater than 275, but it is not in the chart.

Step-by-step explanation:  It is a function because for each x-value there is only one y-value, even if the y-value is the same for two of the x-valus

thus, the first answer choice, y = sec x, is the correct one

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west