Help please!! Given the data

1,2,3,4,5,5,6,6,6,6,7,7,8,8,9,15,28

Find the Inter-Quartile Range, Q_3-Q_1

a
3

b
3.5

c
4

d
4.5

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

X=-3y-5 3x+9y=7 how can u solve this?

The price of a box of 15 cloud markers is $12.70. the price of a box of 42 cloud markers is $31.60. all prices are without tax, and the price of the packaging is the same for any size. how much would 50 cloud markers in a box cost? write an equation which will tell the price p for the number n markers in the box.