Praxis Middle School Mathematics (5164) Practice Exam

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Which equation is in slope-intercept form?

Ax + By = C

y = x^2

x/y = m

y = mx + b

Slope-intercept form is written as y = mx + b, where m is the slope (how steep the line is) and b is the y-intercept (where the line crosses the y-axis). This format shows y as a direct function of x, with the intercept and slope visible right in the equation. Among the given options, the one that matches this pattern is y = mx + b, so that is the equation in slope-intercept form. The other forms don’t fit: Ax + By = C is a standard form that isn’t written as y in terms of x; y = x^2 is a quadratic, not a straight line; and x/y = m isn’t a typical way to express a line in slope-intercept style.