Posted by **chchch** on Thursday, July 5, 2012 at 10:09pm.

a company was charged $290 for 13 frames. it was charged $430 for 20 frames.

A. use the coordinates (13,290) and (20,430) to write a linear equation in point slope form that gives the relationship of the cost to the number of frames

B. find the cost for 25 frames.

- math -
**Reiny**, Thursday, July 5, 2012 at 10:19pm
You have posted 5 questions that are done the same way. I will do this one, and you do the previous 4

slope between the two points (13,290) and (20,430)

= (430-290)/(20-13) = 140/7 = 20

equation:

y-290 = 20(x-13)

arrange it in any way you want.

e.g.

y = 20x - 260 + 290

y = 20x + 30 would be the slope-yintercept form

## Answer This Question

## Related Questions

- physics - A pair of eyeglass frames are made of an epoxy plastic (coefficient of...
- physics - A pair of eyeglass frames are made of an epoxy plastic (coefficient of...
- physics - A pair of eyeglass frames are made of an epoxy plastic (coefficient of...
- maths - a roofer charges $25 per hour for himself and $15 per hour for his ...
- pre-calculus honors - Generate a function that models the situation. Consider ...
- Algebra - (Can someone please help?) A woman bought some large frames for $16 ...
- Math - 1. Write an equation in point-slope form for the line through the given ...
- Algebra - A woman bought some large frames for $16 each and some small frames ...
- physics - (a)The angular speed of a ceiling fan is increased uniformly in 3.0 s ...
- pre-calculus honors - GENERATE A FUNCTION THAT MODELS THE SITUATION. Consider ...

More Related Questions