Find the slope of the line that will go through point (4, 5) and (8, 9) first and then you can use the point-slope form to figure out the equation of the line. Since I am not sure what form of the equation they want, I will just provide you the point-slope form, standard form, and the slope-intercept form of the line.
The slope can be calculated by subtracting the difference of the y-coordinates of the two points and then dividing it by the difference of the x-coordinates.
The point-slope form is: y - y_1 = m(x - x_1) Let's take the coordinate (4, 5) and use 4 for x_1 and 5 for y_1. y - 5 = 1(x - 4)
The slope-intercept form is: y = mx + b We can modify the point-slope form to look like the slope-intercept form. y - 5 = 1(x - 4) y = x - 4 + 5 y = x + 1
The standard form is: ax + by = c We can modify the slope-intercept form to look like the standard form. y = x + 1 y - x = 1 -x + y = 1
Point-slope form: y - 5 = 1(x - 4) Slope-intercept form: y = x + 1 Standard form: -x + y = 1
