Change to slope-intercept form.

Question

A line with a slope of -2 crosses the y-axis at the point (0,15). What is the equation of this line written in slope-intercept form?

Answer 1

The formula to create an equation in slope-intercept form is: y = mx + b

 

So, let's plug in what the problem gives us. It tells us all of the pieces of information we need.

 

'm' stands for slope. If the slope is -2, we can plug it into the equation to create y = -2x + b

 

'b' stands for where the line crosses the y-axis. If a point on the line is (0,15), we can plug it into the equation to create y = -2x + 15

 

Final answer: y = -2x + 15