Question

A student was given the task to prepare a graph of quadratic polynomial = −8 − 2 +

2

. To draw this

graph he take seven values of x. After plotting the points on the graph paper with suitable scale, he obtained the

graph below.

Based on the above graph, answer the following questions:

(a) What is the graph of a quadratic polynomial called?

(i)Parabola (ii)Hyperbola (iii)Ellipse (iv)None of these

(b) The zeroes of given quadratic polynomial are

(i)2, -4 (ii)-2, 4 (iii)3, -4 (iv)-3, -4

(c) Read from the graph the value of y corresponding to x = -1 is :

(i)-8 (ii)-6 (iii)-5 (iv)-2

(d) The graph of the given quadratic polynomial cut at which points in the X – axis?

(i)(-2,0), (4,0) (ii)(0,-2), (0,4) (iii)(0,-2), (0,-8) (iv)None of these

(e) The graph of the given quadratic polynomial cut at which point on Y – axis?

(i)(-8,0) (ii)(0,-8) (iii)(-10,0) (iv)(0,-10)​

Answer 1

Answer:

ANSWER

Let y=2x−5.

The following lists the values of y corresponding to different values of x.

When x=1, then y=2(1)−5=−3

When x=4 then y=2(4)−5=−3

The points A(1,−3) and B(4,3) are plotted on the graph paper on a suitable scale. A line is drawn passing through these points to obtain the graphs of the given polynomial

It crosses X-axis at point (2.5,0).

solution

Answer 2

Answer:

1. atmost 2 points

2. none of these

3.4