Car Hire Cost and Graph Analysis

The video tutorial explains how real-life situations, like car hire costs, can be represented on a Cartesian grid. It covers the formula for calculating costs, the roles of dependent and independent variables, and how to adjust graph scales. The tutorial guides viewers through creating tables to calculate values, plotting these on a grid, and connecting them to form a linear graph.

What is the formula used to calculate the cost of hiring a car?

• C = 25D + 20

• C = 20D + 25

• C = 25 + 20D

• C = 20 + 25D

In the context of the car hire example, what does the 'D' in the formula represent?

• The fixed charge

• The cost per day

• The number of days

• The total cost

What is the dependent variable in the car hire graph?

• Cost

• Time

• Days

• Distance

Why is it unnecessary to show negative values on the graph in this example?

• Because the formula does not allow negative values

• Because the graph only shows positive trends

• Because negative values are not possible in this context

• Because the graph is linear

What is the first step in creating a table for calculating values using the formula?

• Plotting the graph

• Using the formula to calculate values

• Changing the scales on the axes

• Labeling the axes

What should you do after calculating the first value in the table?

• Label the axes

• Plot the graph

• Change the formula

• Calculate the remaining values

What do the plotted points on the graph represent?

• The relationship between time and cost

• The relationship between cost and distance

• The relationship between days and distance

• The relationship between days and cost

What type of line is formed when connecting the plotted points on the graph?

• Curved

• Exponential

• Linear

• Quadratic