Question

Write an equation in y = mx + b form for the table.
Books Bought 1 3 5 7
Total Amount Spent $ 21 39 57 75
a
y = 3x + 21
b
y = 9x + 12
c
y = 5x + 21
d
y = 7x + 12

Answer 1

First you need to pick your x and y, can you do that? Y is the variable that depends on x when x changes

Answer 2

yeah i think i can

Answer 3

so x is books bought and y is amount spent?