Question

The variables x and y are connected by the equation
connected by the equation y = 2x2 – 8x + 11. Some values of
wie corresponding values of y are given in the table.
X
1-1 0 1 2 3 4 5
21 11 5 3 9 11 21
(a) Find the value of q.
(b) On a sheet of graph paper, using a scale of 2 cm to lep
graph paper, using a scale of 2 cm to represent 1 unit on the
x-axis and 1 cm to represent 1 unit on the y-axis, draw the graph of
y = 2x2 - 8x + 11 for -1 <x< 5.
(C) Use your graph in (b) to find
(i) the value of y when x = 1.5,
(ii) the values of x when y = 8,
(iii) the minimum value of y and the value of x at which this occurs.​

Answer 1

Answer:

the value of x is 8 because your sum what mean 2 in 4th p art is 8 is -8

Answer 2

Answer:

x= 3

y=2x^2 -8(3)+11

y= 2(9)-8(3)+11

y=18-24+11y=5