Dependent variable h depends upon two independent variaables, one of which is represented by 50 and the other by the letter t. In other words, h is a function of two variables. Without further detail it is impossible to describe the behavior of this function h=f(50,t).
Suppose that h = f(x,t) = 2x - 1/t. This is my invention.
Then f(50,t) would come out as 2(50) - 1/t, which is a function of just 1 variable.
Answer:
Company A: 
Company B: 
Step-by-step explanation:
The initial fee is the y-intercept, as that is the cost at x = 0, or the cost before any time has passed. Afterwards, the rate the cost increases is the slope.
Linear equation in slope-intercept form:

where m is the slope and b is the y-intercept.
Company A charges $50 up front and $40 per hour afterwards, so the equation would be:

Company B charges $25 up front and $50 per hour, so:

Answer:
m<U=60°
Step-by-step explanation:

Saturday(x)= 4° Fahrenheit
Sunday(y)= x+9
your answer is: 13 degrees Fahrenheit