Let y = a+bx, if a = 25, b = 3.5 findy when x = 4.

1.	Let y = a+bx, if a = 25, b = 3.5 findy when x = 4.
Answer» By substituting a = 25, b = 3.5 and x = 4. we get y = 15 + 3.5 (4) = 25 + 14 = 39.

Answer»

By substituting a = 25,

b = 3.5 and x = 4.

we get y = 15 + 3.5 (4)

= 25 + 14 = 39.

Discussion