Try this suggested example.
PS. the 1st step is marked with red, the 2d step - with green, the 3d step - with blue colours, then the final step is marked with orange.
• The outside temperature changes -4.8°F in 4 hours. What is the average change in temperature each hour?
1 answer:
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Answer:
D
Step-by-step explanation:
Two lines are perpendicular when the product of their slopes = - 1
line 1: y = 3x + 4
(3 , 0) ; (-3,2)
Slope of line 1 = 3
Slope of line 2 = -1/3
3* -1/3 = -1