What is the x-intercept of the graph y = -4x + 8? A) -4 b) 0 c 2 d) 8

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Mark Mottian Profile
Mark Mottian answered
The x-intercept is the value of x when y is equal to zero or the point on x-axis at which a straight line intersects in xy-plane. Hence:

Y = -4x + 8  (your statement)
0 = -4x + 8  (set y to 0)
0 - 8 = -4x + 8 - 8  (subtract 8 from both sides)
-8 = -4x  (collect terms)
-8/-4 = -4x/-4  (divide both sides by -4)
2 = x

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