Question

Jessie saves $6 each week. In how many weeks will she have at least $50?

Answer 1

58.333.... days

Explanation:

using "scale" can solve the problem
we know that Jessie take 7 days to save 6$

lets pretend "=" as "can get"

lets say:
`7dy = 6$`
`7dy * k = 6$ * k`
by the way `6$ * k` is `50$`, so k is `50/6`
`7dy * k = 6$ * k`
`7dy * 50/6 = 6$ * 50/6`
`7dy * 50/6 = 50$`
`58.333.... dy = 50$`

another way is to use a right triangle,
let the base has the width 7, each unit along the y-axis means "1 day"
let the height has the height 6, each unit along the x-axis means "1$"
now extend the height to 50 units, you will find your new big triangle has a base of 58.3...... units

this is because the tangent of the angle is the same
graph{y = 6/7x [-28.13, 103.57, -3.1, 62.7]}