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Which of the following equations is linear?

A.y = x²

B.y = 3/x

C.y = 3x + 2

D.xy = 4

User Cyberlurk
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2 Answers

2 votes
There are three main forms of linear equations.

Slope-intercept Point-slope Standard

y=mx+b y−y₁​​=m(x−x​₁​​) Ax+By=C

Slope-intercept = m is slope and b is the y intercept.

Point-slope = m is slope and (x₁y₁) are point on the line.

Standard = a,b and c are the constants

Equation c is linear => y = 3x + 2
User Virtualnobi
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8.2k points
0 votes
Answer= C

A is a parabola, so it'll look like a "U" shape on a graph, not a line. A is incorrect

B would look like two curved lines on a graph, so it's not linear.

C is in slope-intercept form, which is a big clue that it's probably linear, which it is. C is correct.

D would look like two curved lines, so D is incorrect.

User WaschbaerYOYO
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