Given function: c(x) = 0.5x+70.
Where c is the cost (in dollars) and x is the number of miles you drive the truck.
If we compare given function by slope-intercept form y=mx+b, we get
Slope m = 0.5 in fractions could be written as 1/2.
And y-intercept b =70.
So, in order to graph it, we need to plot y-intercept at 70 first and then plot some more points using rise/run = 1/2.
The red line is the graph for the given function.
We can see that starting value of cost is $70 for 0 number of miles.
x values represents domain and C(x) represents range.
We can take x values greater than or equal to 0 and C values greater than equal to 70.
Therefore, Domain: x≥0 and Range : C(x) ≥ 70.
