Question

A bookstore manager plans to spend $60 on pens and pencils. The cost of each pen is $0.50 and the cost of each pencil is $0.10. The equation 0.10x + 0.50y = 60 can be used to model this situation. Determine the slope-intercept form of this equation

Answer 1

All you need to do is isolate y (so you have the equation in y = mx + b form) and you're done.

Answer 2

so 0.10x=60 ?

Answer 3

What happened to y? You need to rearrange the equation so that you have y = something.

Answer 4

ohh okay

Answer 5

y=0.50+0.10x=60 ?

Answer 6

Lol but now another = has appeared...

To isolate y, first move 0.10x to the other side, so you get 0.50y = 60 - 0.10x. But you're looking for y by itself, not 0.50y. What would you have to do to change this?

Answer 7

would u just take it out?

Answer 8

Take out 0.50 completely? That would change the equation!

y = 60 - 0.10x is a different equation from 0.50y = 60 - 0.10x

You would have to divide both sides by 0.5 (or multiply both by 2) to isolate y. This would give you y = 120 - 0.20x

Answer 9

ohh okay i get it now thanks

Answer 10

@matt101 nvm i dnt get it, i put that answer but it said it was wrong

Answer 11

Well they might want it as y = -0.20x + 120