In a class of 50 students, 40% are girls. Find the number of girls and number of girls in the class.

50 * 0.40 = 20 girls in class
50-20 = 30 boys in class

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.