Please answer all questions and show FULL working

Samples（1）

Find the gradient and the equation of the following line:

Samples（2）

Given that the perimeter of the following rectangle is 64 cm, find the length p:

Samples（3）

Given that the volume of the following prism is 360 cm3, calculate the length x:

Samples（4）

If y books costs x dollars, how many dollars will 1 book cost?

Samples（5）