Question; The graph of y=f(x) is drawn on the grid.
a) Write down estimates for the roots of f(x)=0
b) Use the graph to find an estimates for the roots of f(x)= -1
c) Write down the coordinates of the tuning point of the graph
Solution
Scale;
On x axis; 2cm represents 1 unit
On y axis; 2cm represents 1 unit
NB; Each line on the graph represents 0.2 units
a) f(x)=0, then y=f(x) => y=0, when y=0, then x = -2.7 and 0.7
b) If f(x)= -1 then y = -1, So when y=-1 then x = -2.4 and 0.4
c) The turning point is (-1 , -3)