Question

1.For the data in the table does y vary directly with x if it does write an equation for the direct variation.

Answer 1

Yes

slope = (26 - 13) / (16-8) = 13/8
y = mx + b passing (8,13)

13 = 13/8(8) + b
13 = 13 + b
so b = 13-13 = 0

equation y = 13/8x