Volunteers at Sam's school use some of the student council's savings for a special project. They buy 8 backpacks for $8 each and
fill each backpack with paper and pens that cost $3. By how much did the student council's savings change because of this project? The savings was changed by
dollars.
1 backpack costs 8 dollars and they bought 8 of them, you have to multiply 8 dollars by 8 cause there is 8 backpacks which is 64 , pen and pencils for 1 backpack costs 3 dollars , so you have to multiply 3 by 8 cause there are 8 backpacks which is 24. then you add 64 and 24 which is 88
A direct proportional variation, is really just a slope-intercept form of equation, except that the y-intercept is always 0, and the constant of variation "k" is the slope pretty much.
