1.The gradient of a straight line is the measure of the ratio of the
change to the
change.

The gradient of a straight line is the measure of the ratio of the vertical change to horizontal change

Step-by-step explanation:

Required

Fill in the gap

Gradient is calculated as:

or

Where means change; y and x are vertical and horizontal change respectively

answer: a

step-by-step explanation:

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.