a) If x increases by 1 unit, what is the corresponding change in y?

b) If x decreases by 2 units, what is the corresponding change in y?

Dixie
Nov 21, 2018

#1**+1 **

y = 4x - 3 ...(1)

a) If x increases by 1 unit, what is the corresponding change in y?

Let dy be the change in y. Then y + dy = 4(x + 1) - 3 or y + dy = 4x + 1 ...(2)

Subtract equation (1) from equation (2) to find dy.

b) If x decreases by 2 units, what is the corresponding change in y?

Again let dy be the change in y. Then y + dy = 4(x - 2) - 3 or y + dy = 4x -11 ...(3)

Subtract equation (1) from equation (3) to find dy

.

Alan
Nov 21, 2018