Question

the graph shows the electrical resistance of a wire as a function of its length. determine the slope of the line and indicate the units on the slope.
resistance (milliohm)
length (m)
slope:
units:

Explanation:

Step1: Select two points on the line

Let's take the points (0, 0) and (100, 1500).

Step2: Apply slope - formula

The slope formula is $m=\frac{y_2 - y_1}{x_2 - x_1}$. Here, $x_1 = 0$, $y_1 = 0$, $x_2=100$, $y_2 = 1500$. So $m=\frac{1500 - 0}{100 - 0}$.

Step3: Calculate the slope

$m=\frac{1500}{100}=15$.

Answer:

Slope: 15
Units: milliOhm/m