Please help! how to figure cost

[shayarog]

The bread machine you are interested in costs $100 with tax.
The ingredients to make one loaf of bread cost $.80
What is the rate of cost of one loaf of bread?

What is your start up cost? (cost of machine)... $100???

Write a linear equation, y=mx + b for the total cost..... ?? y=$.80(1) + $100?? is that right?

Then, graph the equation using either point plotting or slope-intercept using at least 3 points.

 

[Otis]

... What is the rate of cost of one loaf of bread?

What is your start up cost? (cost of machine)... $100???

Hello. It seems like we're supposed to ignore energy costs for the rate per loaf, so yes it's just ($0.80)/(1loaf) -- as you've written it below for slope m.

Yes, the cost of the machine is given as $100.

Write a linear equation, y=mx + b for the total cost.....

y=$.80(1) + $100?? is that right?

If they asked you to write an equation for the total cost of baking x loaves of bread, then it's a formula for y in terms of x:

y = 0.80x + 100

x is the number of loaves baked
y is the resulting total cost

The slope (m) is the rate per loaf, and the y-intercept (b) is the start-up cost (i.e., the cost when x is zero -- no loaves made yet).

If they asked you to use the formula to find the total cost of baking one loaf, then let x=1.

y = 0.80(1) + 100

$100.80

?