<u>ANSWER TO QUESTION 7</u>
Independent Variable: Number of Chairs Painted(p)
Dependent Variable: Paint Left(L)
To represent the relationship using a graph, we draw two perpendicular axis, wth Number of Chairs Painted(p) on the horizontal axis, and Paint Left(L) on the vertical axis.
Then we plot the points
, , , .
Using a straight edge, we draw a straight line through the points as shown in the diagram attached.
From the graph the slope is given by
and the y-intercept is
The equation is given by
That is
In words, Paint level is reducing at a rate of oz
<u>ANSWER TO QUESTION 8</u>
Independent Variable: Number of snacks purchased(s)
Dependent Variable: Total Cost(c)
To represent the relationship using a graph, we draw two perpendicular axis, with Number of snacks purchased(s) on the horizontal axis, and Total Cost(c) on the vertical axis.
Then we plot the points
, , , .
Using a straight edge, we draw a straight line through the points as shown in the diagram attached.
From the graph the slope is given by
and the y-intercept is
The equation is given by
That is
In words, the Total cost increases is reducing at a unit rate of
<u>ANSWER TO QUESTION 9</u>
Independent Variable: Number of flight of stairs climbed(n)
Dependent Variable:Elevation (ft above sea level),E
To represent the relationship using a graph, we draw two perpendicular axis, with Number of flight of stairs climbed(n) on the horizontal axis, and Elevation (ft above sea level),(E) on the vertical axis.
Then we plot the points
, , , .
Using a straight edge, we draw a straight line through the points as shown in the diagram attached.
From the graph the slope is given by
and the y-intercept is
The equation is given by
That is
In words, the unit rate of rising above sea level is