Final answer:
The equation of the straight line with slope m=7 and point (-1,-4) is y = 7x - 3.
Step-by-step explanation:
To find the equation of a straight line, we need the slope (m) and a point on the line. In this case, we are given that m = 7 and the point (-1, -4). The equation of a straight line is y = mx + b, where m is the slope and b is the y-intercept. Substituting the given values, we have y = 7x + b. To find b, we substitute the coordinates of the given point into the equation and solve for b. Using (-1, -4), we have -4 = 7(-1) + b. Solving for b, we get b = -3. Therefore, the equation of the straight line is y = 7x - 3.