Answer:
<u>Question (a)</u>
Midpoint of a line segment:

Given:

Given:

<u>Question (b)</u>
Find slopes (gradients) of JL and MK then compare. If the product of the slopes of JL and MK equal -1, then JL and MK are perpendicular.

Given:

Given:


Hence segments JL and MK are perpendicular
X=$30
y=$60
1 hour job- 60x1=60+30=90
3 hour job-60x3=180+30=210
Answer:
The first graph(Left)
Step-by-step explanation:
Because in this form 1/2 is the slope and -5 is the y intercept.
Step-by-step explanation:
Given
(x1 , y1) = ( 0 , 3)
(x2 , y2) = ( 1 , 8)
Now
Gradient =


Hope it will help :)