ANSWER
The slope shows the charge of renting the kayak per minute.
Step-by-step explanation
The equation given is
c = 0.20t + 3.50
c represents the charge of renting a kayak (in dollars)
t represents the amount of time spent renting the kayak
First, we must point out the slope. The slope of the equation is 0.20.
This is because, generally, a linear equation is represented as:
y = mx + c
where m = slope/gradient
c = y intercept
So, by comparison, m = 0.20
The slope is a form of showing the dependence of one variable on another and it is form of comparison.
The slope in the equation given is therefore a relationship between the charge of renting the kayak and the time spent renting it.
It shows the charge of renting the kayak per minute. That is, how much the rent of the kayak costs per minute.