The figure at right shows a graph of y 14x 064 Use the gra

The figure at right shows a graph of y = 1.4x - 0.64 Use the graph to solve: a. 1.4x - 0.64 = 0.2 b. -1.2 = l.4x - 0.64 c. 1.4x - 0.64

Solution

from the graph of y = 1.4x - 0.64

(a) 1.4x - 0.64 = 0.2

==> y = 0.2

from the graph at y = 0.2 , the value of x is 0.6

(b) -1.2 = 1.4x - 0.64

==> y = -1.2

from the graph at y = -1.2 , the value of x is -0.4

(c) 1.4x - 0.64 > 0.2

==> y > 0.2

from the graph for y > 0.2 , x is (0.6 , )

(d) -1.2 > 1.4x - 0.64

==> y < -1.2

from the graph for y < -1.2 , x is (- , -0.4)