do you have answers for any of them yet
okay can you see these points look like they are part of a line
as you get more customer you have less and less hadgets
so that is a
it means remaining gadgets is directly proportional to the number of customers
use those 2 points to find the slope
should start another one so you can get more medals?
slope is given by change in height per change in horizontal distance
change in height is change in y coordinates change in horizontal distance is change in x coordinates
slope tells you height change for every horizontal distance change
(20,24) and (36,4) can you do the work from here?
i don't think so haha :(
you have 2 points, given in (x,y) form
wht are the y coodinates of eahc point
24 and 4
okay so what is the change in y?
okay well -20 we went lower so
what about the change in x coordiantes now
20 and 36 so -16
well this time we went up so 16
so what is the slope
-20 for y and 16 for x changes
how much y are we changing for every x?
what would m be?
are you there? ^-^
m is the slope! :)
so -20=m(16)+b ?
Are you trying to solve for b) right now?
I am just going to walk you through it step by step.
First, we need to find the slope of the line.|dw:1436826415876:dw|
Your m value is -5/4
Next, we need to find the b value, or your x-intersect. (the place where the line crosses the x-axis)
Next, distribute the -5/4 to the terms in the parenthesis. |dw:1436826872444:dw|
add 24 to the 25|dw:1436826936685:dw|
you will get:|dw:1436826976176:dw| which is the answer to b)
Oh Okay! Thanks! What about C?
Give me one second to refresh myself on this problem! :)
For C, we will mainly be looking at the slope of the equation. The slope is -5/4. This means that for every 4 customers there are, the number of gadgets available goes down by 5.|dw:1436891744808:dw|
C does say for EACH additional customer, so you will have to figure out how many gadgets are gone when one customer attends the store.
To find that out, you would take the 5 and divide it by four. You would get 1.25. That is the number of gadgets each customer individually would purchase. So to answer C: For each additional customer, the total number of gadgets decreases by 1.25.
I hope I was able to help you! :)