Question

Answer part two like a 9th-grade human with the writing and explanation, and the math steps: You are planning a camping trip. The campsite you want to rent charges a $15 fee to reserve the site, plus an extra $3 per day.
Part I: Define your variables and write a linear equation in slope-intercept form to represent the cost of the campsite.
Answer to part 1: Let x = number of days you rent the campsite.
Let y = total cost in dollars.

Slope-intercept form is y = mx + b, where m is the rate per day and b is the starting fee (the cost when x = 0).

The rate per day is $3, and the one-time reserve fee is $15. So
y = 3x + 15.

Check: if x = 0 days, y = 15 (you still pay the reservation fee). If x = 4 days, y = 3(4) + 15 = 12 + 15 = $27.

Part II: Explain what the point (2, 21) means in the context of this problem.

(Hint: your answer should be a full sentence and include the words "days" and "dollars").

Answer 1

Step 1 — Substitute x = 2 into y = 3x + 15:
y = 3(2) + 15
y = 6 + 15
y = 21

Step 2 — Interpret the point:
The point (2, 21) means that renting the campsite for 2 days costs 21 dollars (that is, the $15 reservation fee plus $6 for two days).