Find the unknown coordinate so that each ordered pair is a s

Find the unknown coordinate so that each ordered pair is a solution to the equation y = 1/4 x + 4 a. (4, 7) b. (7, -3). a. Find the unknown coordinate. (4) b. Find the unknown coordinate (-3)

Solution

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y = -(1/4)x + 4

a) (4,?)

=> When x = 4

y = (-1/4)(4) + 4

   = -1 + 4

   = 3

Solution

b) (?,-3)

=> When y = -3

-3 = (-1/4)(x) + 4

-7 = (-1/4)(x)

x = 28

Solution