Trabajo

February 2011 Grade 9 – Cal 3 – Linear Graphs CORE (Calculator Allowed)
Name:________________________ Score: /22

1. (a) Write downthe gradient of the line y = 3x – 4.
Answer (a) …………………..……
[1]
(b) Write down the equation of a line through (0, 0) parallel to y = 3x – 4.
Answer (b) ………..………………
[1]2. The equation of a straight line is: y = 4 – 1.5x
(a) Write down the gradient of the line.


Answer (a) ………….…………
[1]
(b)Write down the co-ordinates of the point where the line crosses the y axis.


Answer (b) (…….… , .……..…)
[1]


3. A line has the equation y =1.4x – 7.8
(a) Find the root of this graph
Answer x = ……………
[1]
(b) Find the value of y, when x is 2.5
Answer y = ……………
[1]
(c) Find the point of intersectionbetween this graph, and the graph of y = -6.5
Answer (…….. , ………)
[1]


4.

(a) Draw the three lines y = 4, y = 2x - 4 and y = 6 – xon the grid above.
[4]






5)
(a) A line segment joins the points (-3,9) and (4, 6)
Find the midpoint of this line




(…………… , …………)[2]
(b) A line segment joinsthe points (4, -8) and (12, -20)
Find the gradient of this line



…………………… [2](c) A line segment joins the points (2, -3) and (-5, -10)
Find the length of this line segment



…………………… [3]...