Part A: 5.25
Average speed is 5.25 mi per hr
Part B: 8 hrs because
42 divided by 5.25 is 8
It will take him 10 weeks because $15 x 10= $150
Answer:
Step-by-step explanation:
The equation of a straight line can be represented in the slope intercept form as
y = mx + c
Where
m = slope = (change in the value of y in the y axis) / (change in the value of x in the x axis)
The equation of the given line is
y = 7x - 5
Comparing with the slope intercept form, slope = 7
If two lines are parallel, it means that they have the same slope. Therefore, the slope of the line passing through (2, 1) is 7
To determine the intercept, we would substitute m = 7, x = 2 and
y = 1 into y = mx + c. It becomes
1 = 7 × 2 + c = 14 + c
c = 1 - 14
c = - 13
The equation becomes
y = 7x - 13
If the two lines are perpendicular, it means that the slope of one line is the negative reciprocal of the slope of the other line.
Therefore, the slope of the line passing through (2, 1) is - 1/7
To determine the intercept, we would substitute m = - 1/7, x = 2 and
y = 1 into y = mx + c. It becomes
1 = - 1/7 × 2 + c = - 2/7 + c
c = 1 + 2/7
c = 9/7
The equation becomes
y = - x/7 + 9/7
