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Work out the equation of a line which has a gradient of -2 and passes through the point (1, 7)

Respuesta :

Answer:

y = -2x + 9

Step-by-step explanation:

y = mx + b      m: slope or gradient        b: y intercept

pass (1 , 7)      m = -2      x = 1        y = 7

7 = (-2) * 1 + b

b = 9

equation: y = -2x + 9

check: -2x + 9 = -2 x 1 + 9 = -2 + 9 = 7    y = 7

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