The value of y varies directly with x, and y = −10 when x = 40. Identify the value of y when x = −5.

asked Oct 16, 2019 10.7k views

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1 vote

-10/40 = y / -5
cross multiply
(40)(y) = (-5)(-10)
40y = 50
y = 50/40
y = 5/4 <===

Viky answered Oct 17, 2019

by Viky

7.2k points

4 votes

the value of y when x is -5 is (-10 * -5) 40 = 1.25
y=1.25

Heinrisch answered Oct 21, 2019

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