Q. Which equation represents a linear function?(A) y=−x2−4(B) −3x2+1=y(C) y=x2(D) x+2=y
Identify Quadratic Functions: A linear function is of the form y=mx+b, where m and b are constants, and x is the variable. The graph of a linear function is a straight line. Let's examine each equation to see if it fits this form.
Analyze Equations: First, look at the equation y=−x2−4. This is a quadratic function, not a linear function, because it has the term x2, which makes the graph a parabola.
Check for Linearity: Next, examine the equation −3x2+1=y. This is also a quadratic function because of the x2 term. It is not linear.
Identify Linear Function: Then, consider the equation y=x2. This is another quadratic function due to the x2 term. It is not linear.
Identify Linear Function: Then, consider the equation y=x2. This is another quadratic function due to the x2 term. It is not linear.Finally, look at the equation x+2=y. This can be rewritten as y=x+2, which is in the form of a linear function, y=mx+b, where m=1 and b=2.
Identify Linear Function: Then, consider the equation y=x2. This is another quadratic function due to the x2 term. It is not linear.Finally, look at the equation x+2=y. This can be rewritten as y=x+2, which is in the form of a linear function, y=mx+b, where m=1 and b=2.Since the equation x+2=y is the only one that fits the form of a linear function, it is the correct answer.
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