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What are the (y)-intercept and slope in (8x+3y-30=0)?

Answer and explanation

Correct answer: (y)-intercept (10), slope (-\frac{8}{3})

The direct answer is option A: y-intercept 10 and slope \(-\frac{8}{3}\). Rewrite the equation in the form \(y=mx+c\). Starting with \(8x+3y-30=0\), move the other terms: \(3y=-8x+30\). Divide by 3: \(y=-\frac{8}{3}x+10\). Comparing with \(y=mx+c\), the slope is \(m=-\frac{8}{3}\), and the y-intercept is \(c=10\). Equivalently, putting \(x=0\) gives \(y=10\). Option A is therefore correct. Option B has both signs wrong. Option C treats the original coefficient 30 as the intercept and -8 as the slope without dividing by 3. Option D incorrectly uses the coefficients of x and y directly. The useful rule is: first isolate y; then the coefficient of x is the slope and the constant is the y-intercept.

Related tags

General FormFraction SlopeY Intercept

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