values of h as h -> 0. You can use the table or graph functions of your calculator Graphically, we say we are looking at ( + h)3 - 1 hood of h - 0. To do this, graph y = (1 + x)3 - 1 h in the neighbour- function as x - 0. X and examine the value of the Exercise 3.1 Part A 1. Find the slope of the line through each pair of points. a. (2. 7 ). (- 3 , -8) b . ( 2.2 ). ( 2 - 2 ) c. (6.3, -2.6), (1.5, -1) 2. What is the slope of a line perpendicular to the following? a. y = 3x - 5 b. 13x - 7y - 11 = 0 3. State the equation and sketch the graph of the following straight lines: a. passing through (-4, -4) and - 5 b. having slope 8 and y-intercept 6 c. having x-intercept 5 and y-intercept - 3 d. passing through (5, 6) and (5, -9) 4. Simplify each of the following: b (5+ h ) 3 - 125 1 a. ( 2 + h ) 2 - 4 1 + h C. (3 + h)4- 81 d. h h h h 3 3 - 1 1 3(1 + h)2-3 f ( 2 + h ) 3 - 8 4+ h 4 2 h. 2th + e. h h g. h h 3.1 THE SLOPE OF A T