Focus on the sign of the slope and the y-intercept.
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Practice makes perfect
The equations in all options are given in slope-intercept form.
y= mx+ b
In this form m is the slope and (0, b)) is the y-intercept of the line.
A positive slope indicates an increasing function, a negative slope indicates a decreasing function.
Let's find the sign of m and b for the graph shown.
The graph is decreasing, so m<0.
The graph intersects the y-axis above the x-axis, so b>0.
Let's look at the options and find the equation with a negative slope and a positive y-intercept.
