Graphs of quadratic functions

Question 1 of 10

Find the equation of the line of symmetry of y = x² + 8x + 15.

Question 2 of 10

(a) Copy and complete the table of values for y = x² − x − 12 for −3 ≤ x ≤ 5. (b) Using a suitable scale, draw the graph. (c) From the graph find the roots of the equation x² − x − 12 = 0, the equation of the line of symmetry and the minimum value of y.

Question 3 of 10

For y = 3x² − 3x + 5, the value of y when x = 1 is ___.

Question 4 of 10

To solve x² − 2x = 3 from the graph of y = x² − 2x, draw the line

Question 5 of 10

Find the minimum value of y = x² + 8x + 15.

Question 6 of 10

Find the equation of the line of symmetry of y = x² − 4x + 3.

Question 7 of 10

The roots of ax² + bx + c = 0 are read from the graph where

Question 8 of 10

For y = x² + 6x + 1, the value of y when x = −3 is ___.

Question 9 of 10

If a > 0 in y = ax² + bx + c, the graph

Question 10 of 10

For y = 2x² + 4x − 5, the value of y when x = −3 is ___.