Answer:
d=9
Step-by-step explanation:
The gradient of straight line is given by

Plug in our knows

Answer:
136
Step-by-step explanation
multiply 4 by 31 and add 20
Answer: Line 2
Step-by-step explanation:
Look at the dots on the coordinate grid. The line of fit is a line around those dots, so in this case, the majority of the dots around line 2.