I need some help with this one please, any suggestions?

Question

The cost of producing a number of items x is given by C mx  b, in which b is the fixed cost and m
is the variable cost (the cost of producing one more item).

(a)

If the fixed cost is $40 and the variable cost is $10, write the cost equation.

(b)

Graph the cost equation.

Answer 1

The formula is C = m.x +b

(a) C = 10x+40
example for 10 parts: C = 10 . 10 + 40 = $140
example for 5 parts: C = 10 . 5 + 40 =$90

(b) Draw an x and a y axis
mark the y axis starting at 0 and ending at say 300
mark the x axis sarting at 0 and ending at say 20.
now place a dot on the x y graph for each of the two examples given above and draw a line joining the two dots

Answer 2

C=mx + b
C=10x + 40
C=10x + 40 <----cost equation

now divide it by 10

C=10x +40
---------------- = x + 4 so.... C= x + 4
10

To graph it you would have to find 4 in the y-axis and then go 1 up and 1 down. The rule of rise and run

I don't know if this is what you're looking for, hope it helps

Answer 3

First it is C = mx + b
Then with the numbers given you have
a) C = 10x + 40

b) Tabulate some values and draw your graph. It's simple but nearly impossible with a simple text editor.