Writing a slope intercept form equation when given two points

I think the most useful form of straight-line equations is the "slope-intercept" form: Affiliate This is called the slope-intercept form because "m" is the slope and "b" gives the y- intercept.

But with so many choices, how do we decide which form to use in a real-life situation? Remember, the point slope form is. NOTE: Also remember, that when identifying a point from a word problem, "time" is always the x-coordinate. Find the slope using the slope formula. The procedure for solving this problem is very similar to examples 3, 4 and 5. So we just need to set y equal to in our equation, and solve for x.

Y intercept equation

Remember a point is two numbers that are related in some way. Step 1: Identify your two points. But with so many choices, how do we decide which form to use in a real-life situation? They've given me the value for m, along with values for an x and a y. Solve for the Y-Intercept Choose either of the points you were given and substitute those coordinates into the equation you have so far. If you see an equation with only x and y — as opposed to, say x2 or sqrt y — then you're dealing with a straight-line equation. Then solve the missing value of b. Matching the Formula to the Situation We now know how to convert equations from point slope to standard form, and how to go back and forth between a graph and a linear equation. Although the slope starts as a fraction, it's okay for it to simplify to a whole number; you don't have to leave it in fraction form. That is the basic characteristic of the y-intercept. Find the slope using the slope formula.

Substitute the known values into the slope-intercept formula, and then solve for the unknown value of b. That is the basic characteristic of the y-intercept. Solving for Slope-Intercept Form From Two Points Imagine that you've been asked to write the slope-intercept equation for a line that passes through the points -3, 5 and 2, For a review of how this equation is used for graphing, look at slope and graphing.

Affiliate Common exercises will give you some pieces of information about a line, and you will have to come up with the equation of the line.

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