The cost of 7 apples is $2.10. What is the constant of proportionality that relates to the number of apples ,x, to the cost in d
1 answer:
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Answer:
(3, - 9)
Step-by-step explanation:
Differentiate using the power rule
y = a , then
= na
Given
y = x² - 6x
= 2x - 6
Equate to zero since the measure of gradient is , that is
2x - 6 = 0 ( add 6 to both sides )
2x = 6 ( divide both sides by 2 )
x = 3
Substitute x = 3 into y for corresponding value of y
y = 3² - 6(3) = 9 - 18 = - 9, thus
(3, - 9 ) are the coordinates of the point where the gradient is zero