Start with the formula y=mx + b.
The equation listed above is y = -17. Since x doesn't appear the 'm' in mx must be 0 (the slope). So our equation is now y = 0x -17. To find the y intercept we put 0 in for x. We want to find where the line will cross the Y axis. y = 0*0 -17. That simplifies to Y = -17 (intercept).
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There is no slope nor intercept because there is no equation, simply an expression.
y=-18x+17. Since this is already in Slope-Intercept form, we can determine that the slope is negative 18.
Slope and y-intercept of y equals 2.5x is: Slope is 2.5 and y-intercept is 0
Slope for the equation y equals 7 is zero.
y equals 3x has the greater slope.