Q: What equations describe a straight line with a y-intercept of 7?

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Quadratic, simultaneous and straight line equations

Straight line equations have two variables in the form of x and y

The French mathematician Rene Descartes

The equation of a straight line in slope intercept form is y = mx + c, where y is the y coordinate of any point, x is the x coordinate of that point, m is the slope and c is the y intercept. Therefore, the equations that correctly describe a line with a y intercept of 7 would be: y = mx + 7. The individual slope would then have to be substituted into this equation.

Because, if plotted on a Cartesian plane, all solutions to the equation would lie on a straight line.

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Without the inclusion of an equality sign and not knowing the plus or minus values of the given terms it can't be considered to be a straight line equation

Quadratic, simultaneous and straight line equations

Because a linear equation is, by definition, a straight line. Any line can be defined by selecting any one point on the line and the slope of the line.

Straight line equations have two variables in the form of x and y

The French mathematician Rene Descartes

Because its linear and the equation is a problem to solve

The equation of a straight line in slope intercept form is y = mx + c, where y is the y coordinate of any point, x is the x coordinate of that point, m is the slope and c is the y intercept. Therefore, the equations that correctly describe a line with a y intercept of 7 would be: y = mx + 7. The individual slope would then have to be substituted into this equation.

Because, if plotted on a Cartesian plane, all solutions to the equation would lie on a straight line.

It is a straight line.

Bar graphs and line graphs do not. Straight line, parabolic, and hyperbolic graphs are graphs of an equation.

Yes as for example straight line equations can be plotted on the Cartesian plane

You maybe thinking of straight line equations or simultaneous equations